Martel Electronics MasterCAL User Manual
MasterCAL
Calibrator
June 2004
© 2004 Beta. All rights reserved.
All product names are trademarks of their respective companies.
Beta Calibrators Corporation is a unit of Martel Electronics
For more information on Martel go to www.martelcorp.com
Users Manual
WARRANTY
Martel Electronics Corporation warrants all products against material defects and workmanship for a period of twelve (12) months after the
date of shipment. Problems or defects that arise from misuse or abuse of the instrument are not covered. If any product is to be returned, a
“Return Material Authorization” number must be obtained from our Customer Service Department. This number must be indicated on the
return package as notice to our Receiving Department to accept the shipment. Any package not so marked will not be accepted and will be
returned to the shipper. Martel will not be responsible for damage as a result of poor return packaging. Out of warranty repairs and recalibration will be subject to specific charges. Under no circumstances will Martel Electronics be liable for any device or circumstance beyond
the value of the product.
Customer Service
For service please contact Beta:
Beta Calibrators Corporation
A unit of Martel Electronics
2309 Springlake Road, #600
Farmers Branch, TX 75234-5875
1-800-537-2181
972-241-2200
Or visit us on the World Wide Web:
www.betacalibrators.com
Table of Contents
Title Page
Introduction.................................................................................................................... 1
Standard Equipment...................................................................................................... 2
Safety Information ......................................................................................................... 7
Getting Started Exercise................................................................................................ 10
Operating Features........................................................................................................ 12
Input and Output Jacks............................................................................................. 12
Keys.......................................................................................................................... 14
Display...................................................................................................................... 17
Setting Up the Calibrator ............................................................................................... 19
Using the Strap and Bail........................................................................................... 19
Charging the Battery................................................................................................. 20
Battery Life................................................................................................................ 22
Preserving Battery Life ............................................................................................. 23
Using the Optional Battery Eliminator....................................................................... 23
Selecting the Display Language ............................................................................... 24
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MasterCAL
Users Manual
Adjusting the Display Contrast .................................................................................. 24
Displaying the Date and Time ................................................................................... 24
Using the Backlight ................................................................................................... 26
Personalizing the Calibrator ...................................................................................... 26
Using Measure Mode..................................................................................................... 28
Measurement Ranges............................................................................................... 28
Measuring Electrical Parameters .............................................................................. 28
Testing Continuity ..................................................................................................... 30
Measuring Pressure .................................................................................................. 30
Measuring Temperature............................................................................................ 34
Using Thermocouples........................................................................................... 34
Using Resistance-Temperature Detectors (RTDs)............................................... 37
Measurement Scale .................................................................................................. 41
Linear-Output Transmitters................................................................................... 41
Square-Law Process Variables ............................................................................ 42
Measuring or Sourcing with Custom Units ................................................................ 43
Using the 700-IV Current Shunt ................................................................................ 44
Damping Your Measurements................................................................................... 44
Using Source Mode........................................................................................................ 46
Sourcing Electrical Parameters................................................................................. 46
Simulating a 4 to 20 mA Transmitter......................................................................... 48
Supplying Loop Power .............................................................................................. 50
Sourcing Pressure..................................................................................................... 52
Simulating Thermocouples........................................................................................ 55
Simulating RTDs ....................................................................................................... 56
Source Scale............................................................................................................. 62
Linear-Responding Transmitters .......................................................................... 62
Square-Law Process Variables ............................................................................ 62
ii
Contents
Stepping and Ramping the Output Value ................................................................. 63
Using Manual Step............................................................................................... 63
Using Auto Step ................................................................................................... 64
Ramping the Output............................................................................................. 65
Simultaneous Measure/Source ..................................................................................... 68
Calibrating a Process Instrument .................................................................................. 71
Generating “As Found” Test Data............................................................................. 71
Adjusting the Transmitter.......................................................................................... 76
“As Left” Test Run..................................................................................................... 77
Test Comments ........................................................................................................ 78
Calibrating a Delta-Pressure Flow Instrument .......................................................... 78
Calibrating a Limit Switch ......................................................................................... 79
Transmitter Mode .......................................................................................................... 82
Memory Operations....................................................................................................... 84
Saving Results.......................................................................................................... 84
Reviewing Memory ................................................................................................... 86
Data Logging ............................................................................................................ 86
Recording Min and Max Measurements................................................................... 89
Running a Preloaded Task ....................................................................................... 89
Clearing Memory ...................................................................................................... 89
Using the Built-in Calculator .......................................................................................... 90
Saving to and Recalling from the Registers.............................................................. 90
Using the Calculator to Set the Source Value .......................................................... 91
Quick Guide to Applications .......................................................................................... 91
Replacing the Battery Pack ...................................................................................... 101
Internal Lithium Backup Battery................................................................................ 102
Cleaning the Calibrator............................................................................................. 102
Calibration Data........................................................................................................ 102
(continued)
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MasterCAL
Users Manual
Index
In Case of Difficulty ................................................................................................... 102
Service Center Calibration or Repair......................................................................... 103
Replacement Parts......................................................................................................... 104
Accessories.................................................................................................................... 105
Specifications................................................................................................................. 106
DC Voltage Measurement......................................................................................... 107
AC Voltage Measurement ......................................................................................... 108
DC Current Measurement ......................................................................................... 109
Resistance Measurement.......................................................................................... 109
Continuity Testing ..................................................................................................... 110
Frequency Measurement .......................................................................................... 110
DC Voltage Output .................................................................................................... 111
DC Current Output .................................................................................................... 112
Resistance Sourcing ................................................................................................. 113
Frequency Sourcing .................................................................................................. 114
Temperature, Thermocouples................................................................................... 115
Temperature, Resistance Temperature Detectors.................................................... 118
Loop Power Supply ................................................................................................... 120
Top and Bottom Limits of Ranges with Auto Range On............................................ 121
General Specifications .............................................................................................. 123
iv
List of Tables
Table Title Page
1. Summary of Source and Measure Functions ....................................................................... 4
2. Input/Output Jacks and Connectors ..................................................................................... 12
3. Key Functions....................................................................................................................... 15
4. Battery Life ........................................................................................................................... 22
5. Thermocouple Types Accepted............................................................................................ 35
6. RTD Types Accepted............................................................................................................ 37
7. Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled.......................... 69
8. Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled........................... 70
9. Replacement Parts ............................................................................................................... 104
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MasterCAL
Users Manual
vi
List of Figures
Figure Title Page
1. Standard Equipment............................................................................................................. 5
2. Definition of Symbols............................................................................................................ 7
3. Jumper Connections for Demonstration ............................................................................... 11
4. Measure/Source Example .................................................................................................... 11
5. Input/Output Jacks and Connectors ..................................................................................... 13
6. Keys...................................................................................................................................... 14
7. Elements of a Typical Display .............................................................................................. 18
8. Using the Bail and Installing the Strap.................................................................................. 19
9. Removing the Battery and Using the Charger...................................................................... 21
10. Electrical Measurement Connections ................................................................................... 29
11. Connections for Measuring Pressure ................................................................................... 33
12. Measuring Temperature with a Thermocouple..................................................................... 36
13. Using a Jumper Correctly ..................................................................................................... 39
14. Measuring Temperature with an RTD................................................................................... 40
15. Electrical Sourcing Connections........................................................................................... 47
16. Connections for Simulating a 4 to 20 mA Transmitter .......................................................... 49
17. Connections for Supplying Loop Power................................................................................ 51
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MasterCAL
Users Manual
18. Connections for Sourcing Pressure ...................................................................................... 54
19. Connections for Simulating a Thermocouple ........................................................................ 57
20. Connections for Simulating an RTD...................................................................................... 58
21. Sourcing Temperature using Drywell .................................................................................... 60
22. Checking a Relay Output Trip Alarm..................................................................................... 67
23. Calibrating a Thermocouple Temperature Transmitter ......................................................... 73
24. Limit Switch Terminology ...................................................................................................... 79
25. Calibrating a Chart Recorder ................................................................................................ 92
26. Measuring Voltage Drop ....................................................................................................... 92
27. Monitoring AC Line Voltage and Frequency ......................................................................... 93
28. Calibrating a Current-to-Pressure (I/P) Transmitter .............................................................. 94
29. Measuring the Output Current of a Transmitter..................................................................... 95
30. Measuring a Precision Resistor ............................................................................................ 96
31. Sourcing Resistance ............................................................................................................. 96
32. Checking a Switch................................................................................................................. 97
33. Checking a Tachometer........................................................................................................ 97
34. Calibrating a Pressure-to-Current (P/I) Transmitter .............................................................. 98
35. Calibrating a mV to Current Transmitter................................................................................ 99
36. Checking a Vortex Sheeding Flowmeter............................................................................... 100
37. LCD Operating Environment Specification............................................................................ 126
viii
Introduction
The Beta MasterCAL Calibrator (hereafter referred
to as the calibrator) is a battery-powered, hand-held
instrument that measures and sources electrical and
physical parameters, and provides basic HART
communicator functions when used with HARTcapable transmitters. Refer to the
HART
to use the HART communication feature.
The calibrator lets you troubleshoot, calibrate, verify,
and document your work on process instruments.
Calibrator Specifications are at the back of the
manual.
Mode Users Guide
for instructions on how
MasterCAL
Calibrator
addition to these functions, the calibrator has the
following features:
• General features:
An analog display to make it easy to read
measurements when the input is unstable.
A setup option that lets you set the display to
English, French, German, Italian, or Spanish.
A thermocouple (TC) input/output jack and
internal isothermal block with automatic
reference-junction temperature compensation.
Or, you can manually enter an external
temperature reference.
A summary of the measuring and sourcing functions
provided by the calibrator is shown in Table 1. In
1
The ability to store results for later review.
MasterCAL
Users Manual
The ability to automatically log up to 8,000 data
points.
A serial computer interface for
uploading/downloading tasks, lists, and results.
Automatic calibration procedures for
transmitters and limit switches using split screen
MEASURE/SOURCE mode.
Transmitter mode in which the calibrator can be
configured to emulate the functions of a process
instrument.
Built-in calculator with square-root function, and
accessible registers containing measure and
source values.
An optional bar code wand for entering
alphanumeric characters.
• Measuring features:
Damping (smoothing of the last several
readings), with display indicator of damped
status.
Display of measurements in engineering units,
percent of scale, square-law inputs, or custom
units.
The ability to capture and display minimum and
maximum measured levels.
• Sourcing features:
The ability to set source values to engineering
units, percent of scale, square-law outputs, or
custom units.
Manual and automatic stepping, and an output
ramp feature for testing limit switches. Trip
detect is either a 1 V change or a continuity
status change (Open or Short) from one ramp
increment to the next.
For performance testing and calibration instructions
contact Beta.
To contact Beta, call:
USA and Canada:
1-800-537-2181
972-241-2200
Or visit us on the World Wide Web:
www.betacalibrators.com
Standard Equipment
The items listed below and shown in Figure 1 are
included with your calibrator. If the calibrator is
2
Calibrator
Standard Equipment
damaged or something is missing, contact the place
of purchase immediately. To order replacement
parts or spares, see the user-replaceable parts list
at the end of this manual.
• TL24 industrial test leads (two sets)
• AC20 test clips (two sets)
• TP20 test probes (one set)
• HART interface cable
• BP7235 rechargeable nickel-metal hydride pack
• BC7217 battery charger with Instruction Sheet
• Adjustable quick-release strap (PN 946769)
• Jumper for three-wire RTD measurement
connections (two included, PN 944632)
•
MasterCAL Users Manual on CD
•
MasterCAL
HART
Mode Users Guide on CD
3
MasterCAL
Users Manual
Table 1. Summary of Source and Measure Functions
Function Measure Source
vdc V 0 V to +/-300 V 0 V to 15 V (10 mA max)
hac V 0 V to 300 V rms, 20 Hz to 5 kHz No sourcing
hFrequency 1 Hz to 1 kHz (100 mV to 300 V rms)
1 kHz to 30 kHz (0.5 V to 30 V rms)
30 kHz to 50 kHz (1 V to 30 V rms)
qResistance 0 Ω to 11 k Ω 0 Ω to 11 k Ω
0.1 V to 10 V p-p sine wave, or peak square
wave, 0 Hz to 50 kHz
mdc Current 0 mA to 110 mA 0 to 22 mA (28 V max), sourcing or sinking
qContinuity Beep and the word Short indicates continuity No sourcing
tThermocouple Types E, N, J, K, T, B, R, S, C, L, or U
tRTD
pPressure 27 modules ranging from 0 to 10 in. H2O
(2.5 kPa) to 0 to 10,000 psi (69,000 kPa)
sLoop Power 24 or 28 V (22 mA max)
Note: Use an external hand pump or other pressure source as a pressure stimulus for the source pressure function.
100 Ω Platinum (3926)
100 Ω Platinum (385)
120 Ω Nickel (672)
200 Ω Platinum (385)
500 Ω Platinum (385)
1000 Ω Platinum (385)
10 Ω Copper (427)
100 Ω Platinum (3916)
Note
4
Calibrator
Standard Equipment
TP20
Test Probe
(1 Red and 1 Black)
AC20
Test Clip
(2 Red and 2 Black)
Test Leads
(2 Red and 2 Black)
TL24
Jumper
(2 Black)
Figure 1. Standard Equipment
Strap
V
V
Hz
7
8
4
5
1
2
0
V
R
T
D
.
A
m
A
m
R
T
D
U
S
R
O
C
E
E
A
M
S
30V M
AX
TC
RTD
L
R
E
C
A
9
Z
E
(
R
)
O
6
3
E
N
T
E
R
V
300V
T
C
M
AX
ot01f.eps
5
MasterCAL
Users Manual
BC7217
Battery Charger
BP7235
Nickel-Metal Hydride
Battery Pack
Users
Manual
+
HART Mode
Users Guide
on CD
Figure 1. Standard Equipment (cont)
HART
Interface
Cable
ot02f.eps
6
Calibrator
Safety Information
Safety Information
This calibrator is designed and tested in accordance
with IEC1010-1 and CAN/CSA C22.2 No.
1010.1-92. Use the calibrator only as specified in
AC-Alternating Current
DC-Direct Current
Fuse
Pressure
ON/OFF
Recycling
CAT
II
Figure 2. Definition of Symbols
this manual, otherwise the protection provided by
the calibrator may be impaired.
Symbols used on the calibrator and in this manual
are explained in Figure 2.
CAUTION see explanation in manual
Common (LO) Input equipotentiality
Equipment protected throughout by DOUBLE INSULATION or
REINFORCED INSULATION
Conforms to relevent European Union directives.
Conforms to relevent Canadian Standards Association directives.
Overvoltage (Installation) Category
IEC 1010-1 refers to the level of Impluse Withstand Voltage protection
provided. Typical locations include; Mains Wall outlets, local appliances
and PORTABLE EQUIPMENT.
II
, Pollution Degree 2 per
gj56f.eps
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MasterCAL
Users Manual
Safety Information (cont)
A Warning identifies conditions and actions that pose
hazards to the user; a Caution identifies conditions
and actions that may damage the calibrator or the
equipment under test.
WWarning
To avoid electric shock or personal
injury, adhere to the following practices:
• Do not use the calibrator if it is damaged.
Before you use the calibrator, inspect the
insulating cover. Look for cracks or missing
plastic. Pay particular attention to the
insulation surrounding the connectors.
• Disconnect the power and discharge all high-
voltage capacitors in the equipment under
test before testing resistance or continuity.
• Inspect the test leads for damaged insulation
or exposed metal. Check test lead continuity.
Replace damaged test leads before using the
calibrator.
• Do not use the calibrator if it operates
abnormally. Protection may be impaired.
When in doubt, have the calibrator serviced.
• Select the proper function and range for your
measurement.
• Use caution when working above 30 V ac
rms, 42 V ac pk, or 60 V dc. Such voltages
pose a shock hazard.
• When using the probes, keep your fingers
away from the probe contacts. Keep your
fingers behind the finger guards on the
probes.
• Connect the common test lead before you
connect the live test lead. When you
disconnect test leads, disconnect the live
test lead first.
• Replace the battery as soon as there is a low
battery indication on the display. The
possibility of false readings can lead to
electric shock and personal injury.
8
Calibrator
Safety Information
Safety Information (cont)
WWarning (cont)
• Do not apply more than the rated voltage, as
marked on the calibrator, between the
terminals, or between any terminal and earth
ground.
• When using probes, keep your fingers
behind the finger guards.
• Do not use the calibrator with any part of the
case or cover removed.
• Do not operate the calibrator around
explosive gas, vapor, or dust.
• When using a pressure module, make sure
the process pressure line is shut off and
depressurized before you connect it to or
disconnect it from the pressure module.
• Disconnect test leads before changing to
another measure or source function.
• When servicing the calibrator, use only
specified replacement parts.
• Do not use any battery eliminator other than
the Fluke model BE9005 Battery Eliminator.
Caution
To avoid possible damage to the
calibrator or the equipment under test,
follow these guidelines:
• Disconnect circuit power and discharge all
high-voltage capacitors before testing
resistance, continuity, diodes, or
capacitance.
• Use the proper terminals, function, and range
for your measurements.
9
MasterCAL
Users Manual
Getting Started Exercise
The following is a brief getting started exercise that
will make it easier to understand the instructions in
the rest of the manual.
1. When you first unpack the calibrator, you will
need to charge the battery. See Figure 9 and
charge the battery for 2 hours.
2. Reinstall the battery in the calibrator.
3. Connect the calibrator’s voltage output to its
voltage input as follows: connect leftmost pair of
jacks (V Ω RTD SOURCE) to the right most pair
of jacks (V MEAS). (See Figure 3.)
4. Press o to turn on the calibrator. Press u and
d to adjust the display contrast for the best
looking display. The calibrator powers up in the
dc voltage measurement function, and is taking
readings on the V MEAS pair of input jacks.
5. Press s to switch to the SOURCE screen.
The calibrator is still measuring dc voltage, and
you can see the active measurements at the top
of the display.
6. Press v to select dc voltage sourcing.
Press 5 on the keypad and eto begin
sourcing 5.0000 V dc.
7. Now press M to go to the split-screen,
simultaneous MEASURE/SOURCE mode. The
calibrator is simultaneously sourcing dc volts
and measuring dc volts. You can see the
measurement readings in the top window, and
the active source value in the bottom window as
shown in Figure 4.
10
Calibrator
Getting Started Exercise
V
V
Hz
7
8
4
5
1
2
0
V
m
A
R
T
D
30V
MAX
m
R
T
CAT
SO
U
RC
E
M
E
A
30V
30V
MAX
MAX
TC
R
TD
C
L
E
A
R
9
(
Z
E
O
)
R
6
3
E
T
E
N
.
A
D
S
R
V
300V
T
C
MAX
Figure 3. Jumper Connections for Demonstration
ot03f.eps
gj4s.eps
Figure 4. Measure/Source Example
11
MasterCAL
Users Manual
Operating Features
Input and Output Jacks
Figure 5 shows the calibrator input and output jacks.
Table 2 explains their use.
Table 2. Input/Output Jacks and Connectors
No. Name Description
1 Battery Eliminator jack Jack for the Model BE9005 Battery Eliminator. Use the battery eliminator for bench-top
applications where ac line power is available. This input does not charge the battery.
2 w SERIAL PORT Connects the calibrator to an RS-232 serial port on a personal computer.
3 Pressure module
connector
4 TC input/output Jack for measuring or simulating thermocouples. This jack accepts a miniature
5, 6 wMEAS V jacks Input jacks for measuring voltage, frequency, or three- or four-wire RTDs (Resistance
7, 8 wSOURCE mA,
MEAS mA Ω RTD
jacks
9,10 wSOURCE V Ω RTD
jacks
Connects the calibrator to a pressure module.
polarized thermocouple plug with flat, in-line blades spaced 7.9 mm (0.312 in) center to
center.
Temperature Detectors).
Jacks for sourcing or measuring current, measuring resistance and RTDs, and
supplying loop power.
Output jacks for sourcing voltage, resistance, frequency, and for simulating RTDs.
12
Calibrator
Operating Features
BETA
MasterCAL
S
E
M
A
m
A
S
E
E
C
R
S
U
O
V
V
Hz
7
8
5
2
0
m
Am
RTD
C
A
E
M
E
A
3
0
M
A
X
9
6
3
.
A
T
S
V
4
1
V
RTD
S
O
U
R
C
3
0
V
M
A
X
3
0
V
M
A
X
T
TC
RTD
L
R
E
C
A
(
Z
E
O
)
R
E
N
T
E
R
V
3
0
0
V
T
C
M
A
X
990
1
2
3
P
U
4
10
9
7
8
5
6
ot05f.eps
Figure 5. Input/Output Jacks and Connectors
13
MasterCAL
Users Manual
Keys
Figure 6 shows the calibrator keys and Table 3
explains their functions. The softkeys are the four
unmarked blue keys just below the display. Softkey
functions are defined by the labels that appear above
the softkey during operation. Softkey labels and
other display text are shown in this manual in bold
type, for example,
Choices.
BETA MasterCAL 990
21
3
4
16
MEAS
15
14
13
SOURCE
V
V
Hz
789
456
123
0
mA mA
V
RTD
SOURCE
30V
MAX
30V
MAX
SETUPmA
TC
RTD
CLEAR
(ZERO)
ENTER
.
V
RTD
CAT
MEAS
300V
30V
MAX
TC
5
6
7
8
9
10
11
12
ot06f.eps
Figure 6. Keys
14
Calibrator
Operating Features
Table 3. Key Functions
No. Name Description
1 M key Cycles the calibrator through MEASURE, SOURCE, and MEASURE/SOURCE modes.
2 m key Selects mA (current) measure or source function. For loop power on/off, go to the Setup
mode.
3 s key Enters and exits Setup mode to modify operating parameters.
4 Softkeys Perform the function defined by the label above each key on the display.
5 C key Turns the backlight on and off.
6 p key Selects the pressure measurement or sourcing function.
7 t key Selects TC (thermocouple) or RTD (resistance temperature detector) measurement or
sourcing functions.
8 r key Toggles between HART communication mode and analog operation. In calculator mode, this
key provides the square root function.
9 c key Clears a partial data entry, or zeros the output when in the SOURCE mode. When using a
pressure module, zeros the pressure module reading.
15
MasterCAL
Users Manual
Table 3. Key Functions (cont)
No. Name Description
10 u, d , L, and R
keys
11 ekey Terminates a numeric entry when setting a source value, or confirms your choice in a
12 qkey Toggles between resistance and continuity functions in MEASURE mode, or selects
13 Numeric keypad Used whenever a numeric entry is required.
14 hkey Toggles between ac voltage and frequency functions in MEASURE mode, or selects
15 vkey Selects the dc voltage function in MEASURE mode, or selects dc voltage in SOURCE
16 okey Turns the power on and off.
• Adjust the display contrast.
• Make choices from lists on the display.
• Increase or decrease the source level when using the step feature.
• In calculator mode, provide arithmetic functions (+ - ÷ ×).
list. In calculator mode, provides the equals arithmetic operator (=).
the resistance function in SOURCE mode.
frequency output in SOURCE mode.
mode.
16
Calibrator
Operating Features
Display
Figure 7 shows the features of a typical display. The
display shown is MEASURE mode. Near the top of
the display is “Source Off.” This is the area of the
display that shows what is happening in the other
mode (SOURCE or MEASURE). The other parts of
the display are as follows:
• Status Bar: shows the time and date (if set in
Setup mode), and shows the status of Loop
Power, Battery Save, and Backlight Timeout; all
of which are set in Setup mode. The low battery
and backlight on symbols also appear here.
• Mode Indicator: Shows whether the calibrator is
in MEASURE or SOURCE mode. In split screen
MEASURE/SOURCE mode, there is a Mode
Indicator for each window.
• Measured Value: Shows the measured value in
your choice of engineering units or percent of
scale.
• Range Status: Shows whether Auto Range is on,
and what range is currently being used.
• Custom Units Indicator: Shows that the
displayed units are custom. The original
engineering units of the measure or source
function are not displayed.
• Secondary Value: Shows the measure or source
value in original engineering units whenever
scaling or custom units are active.
17
MasterCAL
Users Manual
Loop Power Annunciator
Time and Date Display
Status Bar
Mode Indicator
Measured Value
Softkey Labels
Figure 7. Elements of a Typical Display
Battery Gauge
Source Status
Undamped (Unsettled)
Indicator
Custom Units Indicator
Secondary Value
ot07c.eps
18
Calibrator
Setting Up the Calibrator
Setting Up the Calibrator
Using the Strap and Bail
After you unpack the calibrator, attach its carrying
strap as shown in Figure 8. You can adjust the strap
as necessary to hang the calibrator on any sturdy
Figure 8. Using the Bail and Installing the Strap
support. Figure 8 also shows you how to open the
bail to stand the calibrator at a comfortable viewing
angle for benchtop use.
gj8f.eps
19
MasterCAL
Users Manual
Charging the Battery
wBefore you use the calibrator for the first time,
charge its battery pack in the external battery
charger. The Model BC7217 charger charges both
the NiMH and Ni-Cd battery packs.
Figure 9 shows how to remove the battery. Remove
the battery door and tap the calibrator with your
hand to get the battery out. Place the battery in the
charger and connect the charger to line power. The
charger automatically senses line voltage and
adjusts itself accordingly.
A discharged battery is fully charged in 2 hours or
less in fast-charge mode (steady indicator light on
the charger). Full charge is maintained after that
time in trickle-charge mode (blinking indicator light
on the charger). Switching between charging modes
is automatic. You can leave the battery pack on
trickle charge indefinitely without damage.
Note
When you remove a charged battery from
the charger, wait for the blinking indicator to
go off before you insert a discharged
battery. It takes about 2 seconds for the
battery charger to reset.
20
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