Altek TechChek 820 User Manual

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Page 1

Process Calibrator

TechChek™ 820

Page 2

GENERAL INFORMATION

Lighten your load by taking the TechChek to every site. It’s like bringing a cartload of test equipment from the shop to the control room or the field. The TechChek 820 sources & reads DC like a milliamp or voltage calibrator, simulates and measures T/Cs & RTDs like a temperature calibrator and generates and counts frequency & Counts-Per-Minute like a frequency calibrator. Your TechChek can also help you trouble shoot like a multimeter! It checks continuity and measures AC line voltage without carrying a seperate instrument. The TechChek 820 is easy to use. Select a function, choose a range, and turn the knob for the precise output you need. Plus, you can store three output values per range for instant recall with

the QUIK-CHEK®switch.

MILLIAMP CALIBRATION

Use at every point in your 4 to 20 mA loop. You can Source & Read 0.00 to 24.00 mA, Simulate a Two-Wire Transmitter or the use the TechChek 820 to simultaneously Power & Measure your Two-Wire Transmitters.

VOLTAGE CALIBRATION

Calibrate all your DC millivolt and voltage instrumentation. Source from 0.00 to 110.00 mV and 0.00 to 10.25 V. Read up to 110.00 mV,

11.00 V and 200.0 VDC.

THERMOCOUPLE CALIBRATION

Source and read directly in °C and °F for T/C types J, K, T& E with 1° resolution. Cold junction compensation automatically adjusts for ambient temperature changes.

RTD CALIBRATION

Built-in Platinum 100 Ohm DIN/IEC 751 table displays in °C or °F. No more decade box and hard-to-read tables. Also reads and sources in Ohms.

GENERAL OPERATING INSTRUCTIONS...........................3

TURN ON.........................................................................3

CONNECTIONS...............................................................3

TILT STAND......................................................................4

CHANGING BATTERIES..................................................4

RESTORING DEFAULT SETTINGS ................................5

CONFIGURING TEMPERATURE SCALES ...............5

ENABLING AUTO-OFF ..............................................5

SELECTING RANGES.....................................................6

SOURCE MODE OPERATING INSTRUCTIONS .................7

STORING & RECALLING QUIK-CHEK

OUTPUTS .......7

SOURCE MODE CONNECTION INSTRUCTIONS

CALIBRATE MILLIAMP INPUTS................................8

SIMULATE 2-WIRE TRANSMITTERS .......................9

POWER & MEASURE 2-WIRE TRANSMITTERS...10

CALIBRATE VOLTAGE INPUTS...............................11

CHECK 1-5 VOLT INPUTS WITHOUT

DISCONNECTING WIRES.......................................12

CALIBRATE THERMOCOUPLE INPUTS................13

CALIBRATE RESISTANCE INPUTS ........................14

CALIBRATE RTD INPUTS .......................................15

CALIBRATE FREQUENCY INPUTS ........................16

READ MODE OPERATING INSTRUCTIONS....................17

MIN/MAX ..................................................................17

OUT OF RANGE SIGNALS......................................17

READ MODE CONNECTION INSTRUCTIONS

READ MILLIAMP OUTPUTS ....................................18

READ VOLTAGE OUTPUTS ....................................19

MEASURE THERMOCOUPLE SENSORS..............20

READ RESISTANCE................................................21

CHECK CONTINUITY..............................................22

MEASURE RTD SENSORS .....................................23

COUNT FREQUENCIES..........................................24

READ AC VOLT AGES..............................................25

SPECIFICATIONS...............................................................26

WARRANTY........................................................................30

CONTENTS

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OPERATING INSTRUCTIONS

GENERAL

TURN-ON

Each time you turn on the TechChek 820 the LCD will display all segments for about 1 second. It then displays the most recently selected Source or Read Setting.

SOURCE - The three QUIK-CHEK outputs will be the same as previously stored. Each time a different function is selected, the three QUIK-CHEK outputs will be recalled.

READ - The 820 is ready to measure the same signal as the last time it was turned on and is automatically updating the MAX & MIN readings for recall at any time.

CONNECTIONS

TechChek 820 has protected banana jacks compatible with standard and safety banana plugs. Included with your TechChek are: a pair of safety test leads with test probes, safety alligator clips standard alligator clips and spade lugs for attachment to a wide variety of instruments. An additional safety test lead and spade lug are also included for 3-Wire RTD connections. Thermocouple connections are made through a miniature thermocouple socket.

Optional KIT-1 includes T/C wires for Type J, T, E & K with miniature T/C plugs (not included).

To prevent accidently overloading the instrument being tested, it is important to correctly set up the outputs before connecting TechChek 820 to any instruments to be calibrated.

GENERAL INFORMATION

FREQUENCY CALIBRATION

Generate Zero Crossing square waves from 1 to 1000 Hz, 0.01 to

10.00 kHz and from 1 to 1000 CPM (Counts-Per-Minute). Also measures as a frequency counter.

MEASURE AC VOLTAGE

Check your line voltage or mains from 0.0 to 250.0 volts AC. Great for troubleshooting power problems.

CHECK CONTINUITY

Locate pairs of wire, open connections and shorts with the built-in beeper.

TECHNICIAN’S LEAD KIT

Included with the TechChek 820 is a test lead kit which consists of three safety test leads with alligator clips, test probes and spade lugs.

Rear Label - Condensed Operation Guide

SOURCE & READ T/C

TERMINALS FUNCTION

– +

SOURCE 3-Wire RTD

1– 4–

READ 3-Wire RTD

1+ 2–

3–

READ Freq & VAC to 250V, VDC to 200V

4– 5+

READ mA, mVDC, Freq & VDC to 10.25V SIMULATE 2-Wire Transmitters

4– 3+

SOURCE mA, mV, V, Ω, 2-Wire RTD, Freq PWR/MEAS mA READ Ω CONTINUITY

1– 2+

See manual

for details.

T/C

45V MAX INPUT

45V MAX

5V MAX

INPUT

300V MAX

INPUT

145

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GENERAL

CONFIGURING TEMPERATURE SCALES

The thermocouple and RTD ranges may be configured for full time use of °C, full time use of °F or selectable °C and °F operation. This configuration is part of the DEFAULT SETTINGS below.

AUTO-OFF

TechChek 820 can be set up to turn itself off after 30 minutes of inactivity. The internal timer is reset to 30 minutes each time the digital pot is turned or a pushbutton is pressed.

DEFAULT SETTINGS

TechChek 820 may be restored to the factory default setting. This will reset the HI and LO “QUIK-CHEK” memories according to the table below and the SET memory to midrange between HI and LO.

OPERATING INSTRUCTIONS

1) Press and hold the STORE/RESET push-button while turning the 820 on.

2) Keep pressing the push-button until the display flashes (about 5 seconds) then release.

3) The °C & °F symbols will flash on the display.

4) Press the RANGE/TYPE push-button to make your selection. With °C flashing the unit will only display in °C, With °F flashing the unit will only display in °F and with both flashing you can select °C and °F for each T/C & RTD type. °C/°F is selected if no push-buttons are pressed.

5) After five seconds the 820 will automatically store your choice and the words BAT and ON will appear on the display indicating that AUTO-OFF is selected.

6) To toggle the AUTO-OFF function on and off press the RANGE/TYPE push-button and the words oN and oFF will display.

7) After five seconds the 820 will automatically store your choice.

8) All segments on the LCD will remain displayed until the 820 has been reset.

OPERATING INSTRUCTIONS

GENERAL

FIELD & BENCH USE

TechChek 820 comes with a carrying case and a built-in tilt stand/hanger. The 820 is held securely in the case by VELCRO® for use with the carrying case open. The carrying case also has a snap-on belt loop which can be looped around a pipe or rail. The tilt stand is easily raised by pulling the stand until it locks into place. The stand can also be reversed for use as a hanger to suspend the 820.

AUTOCAL

To maintain accuracy the TechChek periodically recalibrates its measuring circuitry against internal references. While this is occuring the word CAL will appear on the display for less than 2 seconds.

CHANGING BATTERIES

Low battery is indicated by BAT on the display. Approximately four hours of operation remain before the LCD blanks and TechChek 820 shuts itself down. Turn the 820 off, loosen the captive screw securing the battery compartment and lift off the cover from the bottom of the case. The six “AA” batteries are easily removed and replaced (alkaline supplied and recommended). Replace the battery compartment cover by inserting the tabs and tightening the screw.

QUIK-CHEK

DEFAULTS

RANGE LO SET HI

mA 4.00 12.00 20.00 mV 1.00 5.00 10.00 V 1.00 5.00 10.00

T/C All points 0°C/32°F

Ohms 100.0 200.0 400.0

RTD All points 0°C/32°F kHz 1.00 5.00 10.00

Hz 100 500 1000

CPM 100 500 1000

CAL

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SOURCE MODE

Select source by pressing the SOURCE/READ pushbutton until the word SOURCE appears on the LCD display. To change the output value, turn the speed sensitive digital pot. Turning the knob slowly will cause a gradual change in the output. A faster rate of change will occur when the knob is turned faster. This function operates in all three output positions (HI, SET & LO).

STORING QUIK-CHEK OUTPUTS

1) Switch to HI or LO

2) Turn the knob to desired value

3) Press the STORE push-button The LCD will flash once to show that the value was saved

If a value is in the SET position and you want that value stored in HI or LO, press and hold the STORE push-button while moving the switch to HI or LO. The display will flash once to indicate the value has been stored. Then release the STORE push-button.

RECALLING QUIK-CHEK OUTPUTS

When you need a stored value just flip the QUIK-CHEK switch. Any value for the selected range may be stored in HI & LO. The TechChek 820 remembers the HI, LO and SET values for each function with the power on or off. Each time a different function is selected, the last three QUIKCHEK values for that function will be recalled.

OPERATING INSTRUCTIONS

GENERAL

SELECTING RANGES

Press the RANGE/TYPE pushbutton to select the desired range and scale.

SOURCE RANGES

Milliamp: mA, %mA, 2-Wire Sim, %2-Wire Sim, Pwr Xmtr, %Pwr Xmtr VDC: mV, V T/C: J°F, J°C, T°F, T°C, E°F, E°C, K°F, K°C Ohms: Ohms RTD: Pt °F, Pt °C Frequency: KHz, Hz, CPM

READ RANGES

Milliamp: mA, %mA VDC: mV, 10V, 200V T/C: J°F, J°C, T°F, T°C, E°F, E°C, K°F, K°C Ohms: Ohms, Continuity RTD: Pt °F, Pt °C Frequency: KHz, Hz, CPM VAC: VAC

TURN OFF

Press the POWER push-button to turn the 820 off. If AUTO-OFF is enabled the 820 will turn itself off after 30 minutes of inactivity.

RANGE/TYPE

POWER

STORE/RESET

SOURCE

HI SET LO

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OPERATING INSTRUCTIONS

SIMULATE 2-WIRE TRANSMITTERS

2-WIRE SIM mA, 2-WIRE SIM % (Percent of 4 to 20 mA)

Choose this function to simulate a 2-Wire Transmitter output from

1.00 to 24.00 milliamps. Operates in loops with power supply voltages from 3 to 45 VDC.

1) Disconnect existing 2-Wire Transmitter from the loop

2) Connect the red SOURCE lead of the calibrator to the plus (+) input of the field connections and the black SOURCE lead to the minus (-)

3) Repeatedly press the RANGE/TYPE push-button until the words SOURCE, 2-WIRE SIM and mA or SOURCE, 2-WIRE SIM and % are displayed.

The simulated output of the 2-Wire Transmitter is continuously adjustable from 1.00 to 24.00 mA with the "QUIK-CHEK" switch in the SET position. Zero & Span (or any other values) are available by using the LO and HI "QUIK-CHEKs".

CALIBRATE MILLIAMP INPUTS

mA, mA % (Percent of 4 to 20 mA)

Choose this function to provide an output from 0.00 to 24.00 milliamps. The compliance voltage is a nominal 25 VDC to provide the driving power to your milliamp receivers.

1) Disconnect one or both input wires from the device to be calibrated.

2) Connect the red SOURCE lead of the calibrator to the plus (+) input of the device and the black SOURCE lead to the minus (-).

3) Repeatedly press the RANGE/TYPE push-button until the word SOURCE and mA or SOURCE and % are displayed.

Output current is continuously adjustable with the "QUIK-CHEK" switch in the SET position. Zero & Span (or any other values) are available by using the LO and HI "QUIK-CHEKs".

OPERATING INSTRUCTIONS

T/C

45V

RED

MAX

INPUT

300V MAX

INPUT

45V MAX

INPUT

5V MAX

INPUT

BLACK

145

Milliamp Receiver Input

Controller

Transmitter

Computer

Logger

I/P

DCS

Sensor

RED

45V MAX

INPUT

BLACK

REF +OUT-

45V MAX

INPUT

5V MAX

INPUT

145

T/C

300V MAX

INPUT

+IN-

Receiver

(Powers external

2-Wire Transmitter)

Typical

2-Wire

Transmitter

(Disconnected)

Power Supply

2 to 45 VDC

Page 7

CALIBRATE VOLTAGE INPUTS

V, mV

Choose this function to provide an output from 0.00 mV to 110.00 mV and from 0.00 to 10.25 VDC. Source current is a nominal 20 mA to provide the driving power to your voltage receivers.

1) Disconnect one or both input wires from the device to be calibrated

2) Connect the red SOURCE lead of the calibrator to the plus (+) input of the device and the black SOURCE lead to the minus (-)

3) Press the RANGE/TYPE push-button to switch the display between mV and V.

Output voltage is continuously adjustable with the "QUIK-CHEK" switch in the SET position. Zero & Span (or any other values) are available by using the LO and HI "QUIK-CHEKs".

OPERATING INSTRUCTIONS

POWER & MEASURE 2-WIRE TRANSMITTERS

PWR XMTR mA, PWR XMTR %

Choose this function to simultaneously supply power to a 2-Wire transmitter while displaying the 4-20 mA output of the transmitter.

1) Disconnect one or both input wires from the 2-Wire Transmitter to be calibrated

2) Connect the red SOURCE lead of the calibrator to the plus (+) input of the device and the black SOURCE lead to the minus (-)

3) Connect an appropriate sensor or calibrator to the input of the 2-Wire Transmitter

3) Repeatedly press the RANGE/TYPE push-button until the words SOURCE, PWR XMTR and mA or SOURCE, PWR XMTR and % are displayed.

TechChek 820 supplies a nominal 24 Volts DC at 24 mAto the 2Wire transmitter. The current passed by the transmitter will be accurately displayed by the 820. Calibrate the Transmitter in the usual manner and disconnect the 820.

+IN-

REF +OUT-

145

5V MAX

INPUT

45V MAX

INPUT

300V MAX

INPUT

45V MAX

INPUT

T/C

RED

BLACK

Transmitter Input

Sensor

Process Signal

Simulated Input

Typical

2-Wire

Transmitter

T/C

45V

RED

MAX

INPUT

300V MAX

INPUT

45V MAX

INPUT

5V MAX

INPUT

BLACK

145

Voltage Receiver Input

Controller

Transmitter

Computer

Logger

DCS

Page 8

CALIBRATE THERMOCOUPLE INPUTS

Choose this function to simulate a thermocouple signal into any instrument requiring a thermocouple input. The output of the 820 is automatically cold junction compensated.

1) Disconnect the thermocouple from the instrument being calibrated.

2) Press the RANGE/TYPE push-button until the desired T/C type and temperature scale appear.

3) Use a thermocouple wire and corresponding miniature thermocouple connector to connect the TechChek 820 to the instrument.

Output temperature is continuously adjustable with the "QUIKCHEK" switch in the SET position. Zero & Span (or any other values) are available by using the LO and HI "QUIK-CHEKs"

OPERATING INSTRUCTIONS

CHECK 1-5 VOLT INPUTS

WITHOUT DISCONNECTING WIRES

Most 1-5 Volt receivers in 4-20mAloops have a 250 Ohm resistor across the input of the receiver. This resistor may be mounted internally or externally. TechChek 820 is connected directly across the input of the 1-5 Volt receiver without disconnecting any field wiring. This saves a great deal of time when a large number of voltage receivers, such as chart recorders or computer systems, require calibration.

Make certain that changing the signal input will not disturb the process or cause unexpected alarms when checking on-line instruments. It is important to remember the 820 drives only the device to which it is connected. It has no effect on other devices in the 4 to 20 mA loop. TechChek 820 will clamp the selected value in the mV and V Ranges to the maximum sink current of >16 mA.

1) Connect the red SOURCE lead of the calibrator to the plus (+)

input of the device and the black SOURCE lead to the minus (-).

OPERATING INSTRUCTIONS

45V MAX

INPUT

MAX

INPUT

45V

RED

5V MAX

INPUT

BLACK

145

T/C

300V MAX

INPUT

250Ω

RECORDER COMPUTER

LOGGER

ETC,

1-5V DC

CONTROLLER

(TYPICAL)

ADDITIONAL

4-20 mA OR 1-5V

INSTRUMENTS

+IN-

REF +OUT-

Typical 2-Wire

Transmitter

Instrument with

Thermocouple Input

Controller

Temperature Indicator

Temperature Trip or Alarm

Temperature T ransmitter

T/C

300V MAX

INPUT

45V

MAX

INPUT

45V MAX

INPUT

5V MAX

INPUT

Page 9

CALIBRATE RTD INPUTS

Choose this function to simulate a temperature signal into any instrument requiring an RTD input.

1) Disconnect the sensing RTD from the instrument being calibrated.

2) Press the RANGE/TYPE push-button until the desired RTD type and temperature scale appear.

3) Connect using 3 or 2 wires as in the diagrams below. Spade lugs are recommended to minimize any contact resistance.

Output temperature is continuously adjustable with the "QUIKCHEK" switch in the SET position. Zero & Span (or any other values) are available by using the LO and HI "QUIK-CHEK” positions.

OPERATING INSTRUCTIONS

CALIBRATE RESISTANCE INPUTS

Choose this function to simulate a resistance into a variety of instruments.

1) Disconnect one or both input wires from the device to be calibrated.

2) Connect the red SOURCE lead of the calibrator to the plus (+) input of the device and the black SOURCE lead to the minus (-).

OPERATING INSTRUCTIONS

Three Wire RTD Connection

Two Wire RTD Connection

T/C

45V

RED

MAX

INPUT

300V

MAX

INPUT

45V MAX

INPUT

5V MAX

INPUT

BLACK

145

Receiver Input

Ohms or 2-Wire RTD

Controller

Transmitter

Computer

T/C

300V

MAX

INPUT

T/C

300V MAX

INPUT

45V

RED

MAX

INPUT

45V MAX

INPUT

BLACK

5V MAX

INPUT

BLACK

45V

RED

MAX

INPUT

45V MAX

INPUT

5V MAX

INPUT

BLACK

145

Instrument with

RTD Input Controller

Temperature T ransmitter

Temperature Indicator

Temperature Trip or Alarm

Receiver Input

Ohms or 2-Wire RTD

Controller

Transmitter

Computer

Page 10

1716

READ FUNCTIONS

Select read by pressing the SOURCE/READ pushbutton until the word READ appears on the LCD display. The READ functions measure the desired signal. Multiple scales are available for some functions.

MIN/MAX

To read the Maximum or Minimum INPUT since READ mode was entered, simply switch to MAX or MIN. The value will appear on the LCD along with the word MAX or MIN. The MAX/MIN values are automatically updated and may be viewed at any time without disturbing the other values.

RESTARTING

MIN/MAX

Pressing the STORE/RESET push-button will cause the 820 to store the present reading into the MAX and MIN memories. Upon releasing the STORE/RESET pushbutton the 820 will resume reading the input and update the MAX & MIN values as the measured signal changes.

OUT OF RANGE

SIGNALS

Signals above or below those available for the currently selected range will be indicated by Or and Ur on the display.

OPERATING INSTRUCTIONS

CALIBRATE FREQUENCY INPUTS

Choose this function to provide pulses into frequency measuring instruments. The 820 output is a zero crossing square wave from

-1V to +5V amplitude. Available ranges are from 0.01 to 10.00

kHz, 1 to 1000 Hz and from 1 to 1000 CPM (Counts-Per-Minute). CPM is used to simulate extremely slow frequency signals with greater resolution. For example, 10 Hz is equivalent to 600 CPM. To convert from CPM to Hz Divide by 60. To convert from Hz to CPM multiply by 60.

1) Disconnect any input from the instrument being calibrated.

2) Press the RANGE/TYPE push-button until the desired frequency range appears.

3) Connect the red SOURCE lead of the 820 to the plus (+) input of the device and the black SOURCE lead to the minus (-).

Output frequency is continuously adjustable with the "QUIKCHEK" switch in the SET position. Zero & Span (or any other values) are available by using the LO and HI "QUIK-CHEKs"

OPERATING INSTRUCTIONS

READ

MAX

READ

MIN

Frequency Receiver Input

Flowmeter

Controller

Transmitter

Computer

Logger

DCS

45V MAX

INPUT

45V MAX

INPUT

RED

5V MAX

INPUT

BLACK

145

T/C

300V

MAX

INPUT

STORE/RESET

Page 11

READ DC VOLTAGE OUTPUTS

V, mV

Choose this function to measure from 0.00 to 10.25 DC Volts. For checking low level sensor outputs and other low levels change the input range to display from 0.00 to 110.00 millivolts. Use the high voltage connection to read from 0.0 to 200.0 VDC

1) Connect the red READ (+) lead and the black READ (-) lead of the calibrator across the voltage to be measured.

Signals above or below those available for the currently selected range will be indicated by OVER and UNDER on the display.

OPERATING INSTRUCTIONS

Connection for millivolts and Volts below 10.25 VDC

Connection for Volts to 200.0 VDC

READ MILLIAMP OUTPUTS

mA, mA % (Percent of 4 to 20 mA)

Choose this function to measure from 0.00 to +24.00 milliamps or

-25.0 to 125.0%.

1) Open the current loop at any convenient point along the signal path

2) Connect the red READ (+) lead of the calibrator to the more positive point of the break and the black READ lead (-) to the more negative

Display the present reading, Maximum or Minimum by moving the toggle switch from READ to MAX or MIN. If TechChek 820 is connected in the wrong polarity, the word POLARITY will appear in the display. Simply reverse the leads for correct indication.

OPERATING INSTRUCTIONS

T/C

300V MAX

INPUT

45V

RED

MAX

INPUT

45V MAX

INPUT

BLACK

145

5V MAX

INPUT

Milliamp Output Signal

Controller

Transmitter

P/I

DCS

T/C

45V

RED

MAX

INPUT

300V MAX

INPUT

45V MAX

INPUT

BLACK

145

5V MAX

INPUT

Voltage Output Signal

Controller

Transmitter

Power Supply

Page 12

READ RESISTANCE

Ohms

Choose this function to measure resistance from 0.0 to 1000.0 Ohms.

1) Connect the red READ (+) lead and the black READ (-) lead of the calibrator across the resistance to be measured.

Signals above or below those available for the currently selected range will be indicated by OVER and UNDER on the display.

OPERATING INSTRUCTIONS

MEASURE THERMOCOUPLE SENSORS

Choose this function to read a thermocouple. The input of the TechChek 820 is automatically cold junction compensated.

1) Disconnect the thermocouple from any instrument.

2) Press the RANGE/TYPE push-button until the desired T/C type and temperature scale appear.

3) Use the proper thermocouple wire and corresponding miniature thermocouple connector to connect TechChek 820 to the thermocouple.

OPERATING INSTRUCTIONS

45V MAX

INPUT

45V

MAX

INPUT

RED

5V MAX

INPUT

BLACK

145

Receiver Input

Ohms or 2-Wire RTD

Controller

Transmitter

Computer

T/C

45V MAX

INPUT

45V

MAX

INPUT

5V MAX

INPUT

300V MAX

INPUT

T/C

300V MAX

INPUT

Page 13

MEASURE RTD SENSORS

Choose this function to read an RTD. Three wires must be use for both 2 and three wire RTDs.

1) Disconnect the RTD from any instrument.

2) Press the RANGE/TYPE push-button until the desired RTD type and temperature scale appear.

3) Connect using 3 wires as in the diagrams below. Spade lugs are recommended to minimize any contact resistance.

OPERATING INSTRUCTIONS

CHECK CONTINUITY

Choose this function to check continuity. A tone will sound and a sound symbol will appear on the display when the resistance between the leads is less than 100 Ohms.

1) Plug the leads into the TechChek 820 as shown below.

2) Turn the selector knob to OHMs

3) Press the SOURCE/READ pushbutton until the word READ appears on the display.

4) Press the RANGE/TYPE pushbutton until the word CONTINUITY appears on the display

OPERATING INSTRUCTIONS

45V MAX

INPUT

MAX

INPUT

45V

RED

5V MAX

INPUT

BLACK

145

45V MAX

INPUT

45V MAX

BLACK

INPUT

BLACK

5V MAX

INPUT

RED

145

3 2

T/C

300V MAX

INPUT

BLACK BLACK

T/C

300V MAX

INPUT

RTD Element

RED

Page 14

READ AC VOLTAGES

Choose this function to measure from 0.0 to 250.0 V True RMS.

CAUTION: Care should be used when measuring AC voltage. The included safety test probes or safety alligator clips should be used. Do not exceed voltage limits shown on calibrator.

OPERATING INSTRUCTIONS

COUNT FREQUENCIES

Choose this function to use the 820 as a frequecny counter. Availible ranges are from 0.01 to 10.00 kHz, 1 to 1000 Hz and from 1 to 1000 CPM (Counts-Per-Minute). To measure waveforms with amplitudes between 1 V and 10.25 V RMS use the low level inputs. Use the high voltage connection to read waveforms with amplitudes from 10.25 to 250.0 V RMS

OPERATING INSTRUCTIONS

Connection for signals with amplitudes below 10.25 V RMS

Connection for signals with amplitudes to 250 V RMS

T/C

300V

MAX

INPUT

RED

45V MAX

INPUT

BLACK

45V MAX

INPUT

5V MAX

INPUT

145

Frequency Output Signal

Flowmeter

Flow Sensor

Variable Speed Drive

Controller

Transmitter

45V MAX

INPUT

RED

45V

MAX

INPUT

5V MAX

INPUT

T/C

BLACK

300V MAX

INPUT

Frequency Output Signal

Flow Meter

Line Frequency

Variable Speed Drives

T/C

BLACK

300V MAX

INPUT

AC Voltage Signal

Line Voltage

Mains

45V MAX

INPUT

RED

45V

MAX

INPUT

5V MAX

INPUT

Page 15

POWER & MEASURE 2-WIRE TRANSMITTERS

RANGES & ACCURACY: Same as for MILLIAMP SOURCE OUTPUT CURRENT: up to 24.00 mA TYPICAL DRIVE CAPABILITY:1200 Ohms @ 20.00 mA COMPLIANCE VOLTAGE: nominal 25 VDC @ 20 mA

2-WIRE TRANSMITTER SIMULATOR

RANGES:

1.00 to 24.00 mA; -18.8 to 125.0% of 4 to 20 mA

ACCURACY: Same as for MILLIAMP SOURCE LOOP VOLTAGE LIMITS: Mininum, 3 VDC; Maximum 45 VDC OVERLOAD PROTECTION: Current limited to 25 mA nominal

MILLIAMP READ

RANGES:

0.00 to 24.00 mA; -25.0 to 125.0 % of 4 to 20 mA

ACCURACY: Same as for MILLIAMP SOURCE OVERLOAD PROTECTION: Current limited to 25 mA nominal VOLTAGE BURDEN: 0.9V at 4 mA, 1.2V at 20 mA, 1.9V at 24 mA

DC VOLTAGE SOURCE

RANGES:

0.00 to 110.00 mV; 0.00 to 10.25V

ACCURACY:

±(0.05% of 110 mV+ 0.01mV) = ±0.07 mV ±(0.05% of 10.25 V + 0.01V) = ±0.02V

SOURCE CURRENT: >20 mA SINK CURRENT: >20 mA OUTPUT IMPEDANCE: <0.3 Ohms SHORT CIRCUIT DURATION: Infinite

MEASURE AC VOLTS

RANGE: 0.0 to 250.0 V True RMS ACCURACY:From 10 to 250 V AC ±(2% of 250 V + 0.1 VAC) = ±5.1 VAC MAXIMUM CREST FACTOR:< 3 FREQUENCY RANGE: 45 to 800 Hz

SPECIFICATIONS

GENERAL

TYPICAL 90 DAYACCURACY : ± (0.025% of Full Scale + 1 LSD)

1 YEAR ACCURACY: ±(0.05% of Full Scale + 1 LSD) WARM UP TIME: 10 seconds to specified accuracy, 2 minutes to

maximum accuracy

TEMPERATURE EFFECT: ±0.01%/°C based on 23°±25°C BATTERIES: Six “AA”, (R6) batteries (Alkaline supplied and

recommended)

BATTERY LIFE:

MILLIAMP SOURCE & 2-WIRE MODES: Nominal 50 hours at 12 mA, 20 hours at 20 mA with 250 Ohm load

OTHER FUNCTIONS: Nominal 50 hours LOW BATTERY INDICATION: “BAT” indication on the display at approximately 4 hours left

OVERLOAD PROTECTION: Three fuses, 250 mA [need rating] NOISE: ≤1 LSD at frequencies less than 10 Hz NORMAL MODE REJECTION RATIO: 50 dB @ 50/60 Hz OPERATING TEMPERATURE RANGE: -5 to +130 °F (-20 to +55°C) STORAGE TEMPERATURE RANGE: -13 to +130°F (-25 to +55°C) RELATIVE HUMIDITY: 10 to 90%, non-condensing for 24 hours

from 0 to 35°C OVERALL SIZE: 158.1 x 83.1 x 49.3 mm (6.23 x 3.27 x 1.94 inches)

WEIGHT: 0.6 kg (1 lb, 5 oz)

MILLIAMP SOURCE

RANGES:

0.00 to 24.00 mA; -25.0 to 125.0 % of 4 to 20 mA

ACCURACY: ±(0.05% of 24 mA Span + 0.01 mA) = 0.02mA TYPICAL DRIVE CAPABILITY: 1200 Ohms @ 20.00 mA COMPLIANCE VOLTAGE: nominal 25 V @ 20 mA

SPECIFICATIONS

Typical 90 day accuracy can be estimated by dividing the 1 year % of full scale accuracy by 2. Additions to the specification, such as + 1 LSD, remain constant.

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ACCURACY RTD: ±1°C (At 1 mAExcitation Current) RTD Type: Pt 100 Ohm DIN/IEC 751, Alpha = 1.3850 (0.00385)

RANGE RTD: -100 to 850°C; -148 to 1562°F TEMPERATURE EFFECT: ±((0.035 mV/°C)*(1/mAExcitation Current)) ALLOWABLE EXCITATION CURRENT: 0.125 to 2.0 mAcontinu-

ous DC

READ RTD & OHMS

RANGE OHMS: 0.0 to 1000.0 Ohms ACCURACY: ±(0.05% of 1000.0 Ohms + 0.1 Ohm) = ±0.6 Ohms RTD RANGE & ACCURACY: Same as for SOURCE RTDs EXCITATION CURRENT SUPPLIED: 1 mA, nominal

FREQUENCY SOURCE

RANGES: 1 to 1000 CPM (Count-Per-Minute); 1 to 1000 Hz,

0.01 to 10.00 kHz

ACCURACY:

±(0.05% of 1000 CPM + 1 CPM) = ±2 CPM ±(0.05% of 1000 Hz + 1 Hz) = ±2 Hz

±(0.05% of 10.00 kHz + 0.01 kHz) = ±0.02 kHz OUTPUT WAVEFORM: Square Wave, Zero Crossing, -1V to +5V ± 10%

RISETIME: Hz <5 microseconds; CPM <100 microseconds OUTPUT IMPEDANCE: <100 Ohms SOURCE CURRENT: >1 mA at 10 kHz SHORT CIRCUIT DURATION: Infinite

MEASURE FREQUENCY

RANGES & ACCURACY: Same as for FREQUENCY SOURCE TRIGGER LEVEL: 1 V RMS, DC coupled INPUT IMPEDANCE: > 1Meg Ohm + 60 pF

CONTINUITY CHECKING

TEST CURRENT: Nominal 1 mA THRESHOLD: 100 Ohm ±20% INDICATION: Steady tone & Symbol on LCD plus Ohm Reading

SPECIFICATIONS

MEASURE DC VOLTS

RANGES:

0.00 to 110.00 mV; 0.00 to 10.25 V; 0.0 to 200.0 V

ACCURACY:

±(0.05% of 110 mV+ 0.01mV) = ±0.07 mV ±(0.05% of 10.25 V + 0.01V) = ±0.02V

±(2% of 200.0 V + 0.1V) = ±4.1 V INPUT RESISTANCE: >1 Meg Ohm to 10.25V, >5 Meg Ohm to 200V

SOURCE RESISTANCE EFFECT: 0.01% per 100 Ohms

SOURCE THERMOCOUPLES

RANGES:

Type J -100 to 1200°C; -148 to 2192°F

Type K -100 to 1371°C; -148 to 2500°F

Type T -100 to 400°C; -148 to 752°F

Type E -100 to 1000°C; -148 to 1832°F ACCURACY:

1°C for temperatures above 0°C

2°C for temperatures below 0°C

COLD JUNCTION ACCURACY: ±1°C COLD JUNCTION EFFECT: within 0.05°C per °C change OVERLOAD PROTECTION: Fused OUTPUT IMPEDANCE: <0.3 Ohms SOURCE CURRENT: :>20 mA

READ THERMOCOUPLES

RANGES & ACCURACY: Same as for SOURCE THERMOCOUPLES INPUT IMPEDANCE: > 1 Meg Ohm OPEN THERMOCOUPLE DETECTION: 450 millisecond pulse.

Nominal threshold, 10 K Ohms.

SOURCE RTD & OHMS

RANGE OHMS: 0.0 to 400.0 Ohms ACCURACY:±0.05% of Full Scale + 0.075 mV/mAExcitation Current ACCURACY OHMS: ±(0.05% of 400.0 Ohms + 0.1 Ohm = ±0.3

Ohms (At 1 mA Excitation Current)

SPECIFICATIONS

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NOTES

WARRANTY

Altek products are warranted to be free from defects in material and workmanship (excluding fuses, batteries and leads) for a period of three years from the date of shipment. Warranty repairs can be obtained by returning the equipment prepaid to our factory. Products will be replaced, repaired, or adjusted at our option. Altek

gives no other warranties, including any implied warranty of fitness for a particular purpose. Also, Altek shall not be liable for any

special, indirect, incidental or consequential damages or losses arising from the sale or use of its products.

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ORDERING INFORMATION Part No.

MODEL 820 TechChek 820 PROCESS CALIBRATOR

Included with each Model 820 are:

Carrying Case with belt loop and shoulder strap Test Lead Kit

NOTES

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