GIMA
Multi-Function Electricity Meter
OPERATOR’S MANUAL
SIMPSON ELECTRIC COMPANY
520 Simpson Avenue
Lac du Flambeau, WI 54538
715-588-3311 FAX: 715-588-7930
Printed in U.S.A. Part No. 06-117285, Edition 2, 03/06
Visit us on the web at www.simpsonelectric.com
28
About this manual
!
!
To the best of our knowledge and at the time written, the information contained in
this document is technically correct and the procedures accurate and adequate to
operate the instrument in compliance with its original advertised specifications.
Notes and Safety information
This Operator’s Manual contains warning symbols which alert the user to check
for hazardous conditions. These appear throughout this manual where applicable,
and are defined below. To ensure the safety of operating performance of this instrument, these instructions must be adhered to.
Warning, refer to accompanying documents.
Caution, risk of electric shock.
This instrument is designed to prevent accidental shock to
the operator when properly used. However, no engineer ing design can render safe an instrument which is used
carelessly. Therefore, this manual must be read carefully
and completely before making any measurements.
Failure to follow directions can result in a serious or
fatal accident.
27
Digital (Pulse) Outputs
Function 1 pulse / energy unit (Output #1=N Wh, Output #2=N varh)
Scaling Settable 1,10 or 100 counts of associated register
Pulse Period 100ms. (2ms Rise, 2ms Fall)
Type N/O Volt free contact. Optically isolated BiFET
Contacts 100mA AC/DC max, 100V AC/DC max
Isolation 2.5kV (50V #1 to #2)
General
Temperature
Operating
Storage
Environment IP40
Humidity <75% non-condensing
Mechanical
Enclosure DIN 96mm x 96mm Mablex ULV94-V-O
Dimensions 96mm x 96mm x 80mm (72mm behind panel)130mm
Weight Approx. 400g
Terminals Rising Cage. 4.0mm2 cable max
-10 deg C to +65 deg C-25 deg C to +70 deg C
behind panel with options unit fitted
Technical Assistance
SIMPSON ELECTRIC COMPANY offers assistance Monday through Friday,
8:00 am to 4:30 pm Central Time. To receive assistance contact Technical Support or Customer Service at (847) 697-2260 or contact us through our web site
at www.simpsonelectric.com.
Warranty and Returns
SIMPSON ELECTRIC COMPANY warrants each instrument and other articles
manufactured by it to be free from defects in material and workmanship under
normal use and service, it’s obligation under this warranty being limited to making good at its factory said instrument or other article of equipment which shall
within one (1) year after delivery of such instrument or other article of equipment
to the original purchaser be returned intact to it, or to one of its authorized service
centers, with transportation charges prepaid, and which its examination shall disclose to its satisfaction to have been thus defective; this warranty being expressly
in lieu of all other warranties expressed or implied and of all other obligations or
liabilities on its part, and SIMPSON ELECTRIC COMPANY neither assumes nor
authorizes any other persons to assume for it any other liability in connection with
the sales of its products.
This warranty shall not apply to any instrument or other article of equipment
which shall have been repaired or altered outside the SIMPSON ELECTRIC
COMPANY factory or authorized service centers, nor which has been subject to
misuse, negligence or accident, incorrect wiring by others, or installation or use
not in accord with instructions furnished by the manufacturer.
Starting Serial Numbers 02-24-
26
CONTENTS
1. MAINTENANCE ...................................................................................1
2. METER OPERATION ...........................................................................1
2.1 Measurements .............................................................................1
2.1.1 Balance Current Measurements ....................................................2
2.1.2 Rolling Demand (V, I kW, kVA and kvar Demands) ...........................2
2.1.3 Meter Types .............................................................................2
2.2 Power Up ......................................................................................3
2.3 Display Pages ..............................................................................3
2.4 Display Menus ............................................................................8
2.5 Display Scaling ............................................................................9
2.5.1 Voltage Scaling (Phase, Peak, MD, Pk MD) .....................................9
2.5.2 Line-Line Voltage Scaling (V
2.5.3 Current Scaling (Phase, Peak, In, MD, Pk MD) .................................9
2.4.4 Per Phase & System Power Scaling (W, VA, var) ...........................10
2.4.5 Energy Registers (Wh, VAh, varh) ..............................................10
2.4.6 Miscellaneous (Frequency, PF, THD)...........................................10
2.6 Energy Register Reset ..............................................................11
2.7 Peak Voltage Reset ...................................................................11
2.8 Peak Current Reset ...................................................................11
2.9 Peak Demand Reset• .................................................................11
2.10 Isolated Pulse Outputs• ..........................................................12
3. INSTALLATION .................................................................................13
3.1 Panel Mounting..........................................................................13
3.2 CT Connections .........................................................................14
3.3 Voltage Connections.................................................................14
3.4 Auxiliary Mains Supply (L & N) ................................................14
3.5 Connection Schematics ...........................................................15
) ....................................................9
L-L
Accuracy
Phase Current 0.2% Ib (1.0% Rdg. 0.05 Ib £ Iph £ 1.2 Ib) ±1 digit.
Neutral Current 0.6% Ib (2.0% Rdg. 0.05 Ib £ In £ 1.2 Ib) ±1 digit.
Phase Voltage 0.2% Vb (1.0% Rdg. 0.2 Vb £ Vph £ 1.2 Vb) ±1 digit.
Line-Line Voltage 0.3% Vb (1.0% Rdg. 0.2 Vb £ VLL £ 1.2 Vb) ±1 digit.
Phase Watts 0.4% FS (1.0% Rdg. 0.05FS £ P £ 1.2FS) ±1 digit.
Phase VA 0.6% FS (1.5% Rdg. 0.05FS £ Q £ 1.2FS) ±1 digit.
Phase var 0.8% FS (2.0% Rdg. 0.05FS £ S £ 1.2FS) ±1 digit.
Phase PF ± 0.2 Degrees
System Watts 0.6% FS (1.0% Rdg. 0.05FS £ P £ 1.2FS) ±1 digit.
System VA 1.0% FS (1.5% Rdg. 0.05FS £ Q £ 1.2FS) ±1 digit.
System var 1.5% FS (2.0% Rdg. 0.05FS £ S £ 1.2FS) ±1 digit.
System PF ± 0.2 Degrees
Frequency ±0.05Hz. 45Hz £ F £ 65Hz
Wh Register Class 1.0 EN 61036
VAh Register Class 2.0
varh Registers Class 2.0 IEC 1268
% THD Amps ± 0.5% THD 0.05 Ib £ Iph £ 1.2 Ib
% THD Volts ± 0.5% THD 0.2 Vb £ Vph £ 1.2 Vb
Timebase Better than 100ppm
4. PROGRAMMING ...............................................................................17
4.1 Description ................................................................................17
4.2 Entering and Exiting Programming Mode...............................17
4.3 Setting The CT Primary Current...............................................17
4.4 Setting The PT Primary Voltage ...............................................18
4.5 Setting Pulse Output 1 Rate .....................................................19
4.6 Setting Pulse Output 2 Rate .....................................................20
4.7 Setting The Ampere/Voltage Demand Period .........................21
4.8 Setting The kW, kVA, kvar Rolling Average Period ...............22
5. OPTIONS ...........................................................................................23
5.1 Retro-Fit Modules .....................................................................23
6. SPECIFICATION ................................................................................24
Display
Display Type Custom, supertwist, LCD with LED backlight
Data Retention 10 years minimum
Display Format
Display Update
Stores energy registers, user settings, and peaks
3 Lines 12mm digits + 3.8mm custom legends1 second
25
6. SPECIFICATION
Inputs
System 3-Phase 3 or 4 Wire Unbalanced Load
Voltage Vb. 230 / 400 Volt. 3-Phase 3 or 4 Wire
Vb. 63 / 110 Volt optional
Vb. 120 / 208 Volt optional
Current Ib 5 Amp from external current transformers (CTs)
Ib 1 Amp optional
Fully Isolated (2.5kV each phase)
Measurement Range
Voltage
Current
Frequency Range
Fundamental
Harmonics
Input Loading
Voltage
Current
Overloads
Voltage
Current
Auxiliary Supply
Standard 230 Volt 50/60Hz ±15%
Options 110 Volt 50/60Hz ±15%. (Others to order)
Load 5 VA Maximum
20% to 120%0.5% to 120%
45 to 65HzUp to 20th harmonic
Less than 0.1 VA per phase
Less than 0.1 VA per phase
x2 for 2 seconds maximum
x40 for 0.5 seconds maximum
1. MAINTENANCE
The equipment should be maintained in good working order. Damage
to the product should be repaired by the manufacturer. The meter may
be cleaned by wiping lightly with a soft cloth. No solvents or cleaning
agents should be used. All inputs and supplies must be isolated before
cleaning any part of the equipment.
2. METER OPERATION
2.1 Measurements
The GIMA makes use of a high speed micro-processor and an Analog
to Digital converter to monitor input signals from three independent
phases. Each phase voltage, current and power (kW) are measured directly and a number of other parameters derived from these in software.
The measurement process is continuous with all six signals scanned
simultaneously at high speed. Unlike many other sampling systems,
which sample one phase after another, this ensures that all input
cycles are detected. Distorted input waveforms, with harmonics to the
20th are therefore detected accurately.
Derived parameters are calculated and displayed once a second,
scaled by user programmed constants for current and voltage transformers.
Instantaneous power parameters are integrated over long time periods
providing a number of energy registers. System frequency is detected
by digital processing of the phase 1 voltage signal.
2.1.1 Balance Current Measurements
The rms. value of the instantaneous sum of the three phase currents
is available on some GIMA meter types. The total current in a three
phase system may be represented as :
I
= I1 + I2 + I3 = I
bal
I
represents any current leaving the system (e.g. Leakage to earth)
LEAK
In represents current in the neutral (4 wire systems only)
NOTE: In 3-Phase 3-Wire systems the GIMA must be wired using 3
CTs as shown in Figure 3-3 for balanced current measurements to be
made.
24 1
LEAK
+ I
n
2.1.2 Rolling Demand (V, I kW, kVA and kvar Demands)
5. OPTIONS
Average values of volts, Amps kW, kVA and kvar (if fitted) are calculated over a user programmable time period (10 - 2500 seconds for V
and I, 1 - 60 minutes for kW, kVA and kvar). The displays show the
averages for the most recent time period ending at the time the display
was last updated. The demand period is continuously updated as time
progresses hence the term “Rolling Demand”.
2.1.2.1 Calculating Rolling Demand
Each user set time period is split into smaller sub-periods (10 for V and
I, 15 for kW, kVA and kvar). An average value for measurements taken
every second during a sub-period are calculated for each parameter.
The most recent 10 (15 for kW, kVA and kvar) sub-period averages are
stored in memory as an array. An average of the data in each of these
arrays is displayed as MD (rolling demand). On power up (or after a
brown-out) the sub-period array values are reset to zero. During the
first full MD period the Rolling Demand value will accumulate as the
zeroes are replaced with valid sub-period averages.
2.1.2.2 Peak Demand (kW, kVA, kvar, V and I Pk)
Peak MD readings are the maximum recorded values of corresponding
Rolling Demand values.
5.1 Retro-Fit Modules
A range of retro-fit options modules are available for the GIMA. These
provide additional features to the meter such as Modbus serial communications, analogue outputs, alarms etc. A single options module may be
mounted to the rear of the GIMA as shown.
For detailed information on individual options modules refer to the separate Instruction manual.
These may be used to determine the maximum load requirement of a
system. They are often used to determine spare capacity in a supply
system, supply plant requirement etc.
On power failure or brown-out Peak Demand values are automatically
saved in non-volatile memory within the GIMA. The memory requires
no battery and will hold the value for up to 10 years in the absence of
mains power.
2.1.3 Meter Types
Four Standard GIMA meter types are available to suit a range of applications. The meter type defines a number of display pages which
may be selected and the parameters metered. This manual covers all
meters independent of type.
Figure 5-1. Options Module Attached to GIMA
2 23
4.8 Setting The kW, kVA, kvar Rolling Average Period
The averaging period used in calculation of kW, kVA and kvar Rolling
Demands (ref. Section 2.1.2) may be set in the range 1-60 minutes. This
period may be selected to match specific standards, or to set a convenient filter for short term fluctuations in input power, as required.
During programming, the Average Period is displayed in minutes.
2.2 Power Up
On power up the GIMA shows the meter type and software issue.
The example below shows software issue 1.06 meter type 3
CubE
SOFt
106-3
2.3 Display Pages
To select current measurements press the I key repeatedly until the
desired page is displayed. The number of pages available is dependant on meter type.
To select voltage measurements press the V key repeatedly until the
desired page is displayed. The number of pages available is dependant on meter type.
Figure 4-6. Setting Power Rolling Demand Period
Press r to increase the Averaging Period by 1 minute.
Press s to decrease the Averaging Period by 1 minute.
Press and hold for 2 seconds when done.
To select power/energy measurements press the P key repeatedly
until the desired page is displayed. The number of pages available is
dependant on meter type.
Automatically scrolling pages showing PF, Volts & Amps on each
phase are obtained by pressing >> once. This is available on all meter types except type 6 (see note).
Display pages available on the full range of GIMA meters are shown
below followed by tables showing those available on each standard
meter type.
22 3
Phase Currents: Instantaneous true rms.
Current on phases1, 2 and 3, scaled by the
user programmable CT primary.
Peak Hold Currents: The largest instantaneous reading of phase 1, 2 and 3 currents
(above) individually recorded since last reset.
Balance Current: The true rms. sum of
the three instantaneous current waveforms
scaled as phase current above. This is
equivalent to neutral current in a three phase
4-wire system.
4.7 Setting The Ampere/Voltage Demand Period
The averaging period used in calculation of Ampere and Voltage Rolling
Demand (ref. Section 2.1.2) may be set in the range 10-2500 seconds
(steps of 10s). This period may be selected to set a convenient filter for
short term fluctuations in input power, as required.
During programming, the Average Period is displayed in seconds.
Phase Voltages: Instantaneous true rms.
voltages on phases 1, 2 and 3 with respect
to neutral. These readings are scaled by user
programmable PT primary.
Line-Line Voltages: Instantaneous true
rms. line to line voltages scaled by user programmable PT primary.
1=Line1-Line2
2=Line2-Line3
3=Line3-Line1
4 21
Figure 4-5. Setting Ampere/Voltage Demand Period
Press r to increase the Averaging Period by 10 seconds.
Press s to decrease the Averaging Period by 10 seconds.
Press and hold for 2 seconds when done.
4.6 Setting Pulse Output 2 Rate
Isolated pulse output #2 may be set to provide a single pulse at the end
of every 1, 10, or 100 increments of the Total varh register irrespective of
display scaling and decimal point. This allows the unit to be configured
to suit a wide variety of data logging, building management type applications.
During programming, the Pulse Output #2 Rate is displayed scaled as
the total varh register for convenience. A display of “ PL2rAtE
10.0 kVArh” indicates that a single pulse will occur, at output #2, at the
end of each 10 kvarh.
Peak Hold Voltages: The largest instantaneous readings of phase voltages (above)
individually recorded since last reset.
Ampere Demand: MD based on rolling averages of per phase AmpsUser programmable sub-period 10s to 2500sAverage based
on 10 sub-period values (1s to 250s) Display
updated at the end of each sub period
Peak Ampere Demand: The largest reading of per phase Ampere Demand values
(above) recorded since last reset.Display
updated at the end of each sub period
Figure 4-4. Setting the Pulse Output #2 Rate
Press r to increase the Pulse Output Rate by a factor of 10.
Press s to decrease the Pulse Output Rate by a factor of 10.
Press and hold for 2 seconds when done.
20 5
Voltage Demand: MD based on rolling
averages of per phase VoltsProgrammable
sub-period as Ampere DemandAverage
based on 10 sub-period values (1s to 250s)
Display updated at the end of each sub
period
Peak Voltage Demand: The largest reading of Voltage Demand values (above)
recorded since last reset.Display updated at
the end of each sub period
Phase Watts: Instantaneous true rms.
watts on phases 1,2 & 3,scaled by user
programmable CT and PT values.
Phase VA: Per phase instantaneous VA
calculated as:
VA1 = V1 x I
VA2 = V2 x I
VA3 = V3 x I
1
2
3
Where Vx and Ix are rms. values.
Phase var: Per phase instantaneous var
calculated as:
var1 = √(VA
var2 = √ (VA
var3 = √(VA
2
1
- W
2
- W
2
2
- W
3
2
)
1
2
)
2
2
)
3
Capacitive var shown as negative
4.5 Setting Pulse Output 1 Rate
Isolated pulse output #1 may be set to provide a single pulse at the
end of every 1, 10, or 100 increments of the Wh register irrespective of
display scaling and decimal point. This allows the unit to be configured
to suit a wide variety of data logging, building management type applications.
During programming, the Pulse Output #1 Rate is displayed scaled as
the Wh register for convenience. A display of "PL1rAtE10.0 kWh”
indicates that a single pulse will occur, at output #1, at the end of each
10 kWh.
Figure 4-3. Setting the Pulse Output #1 Rate
Press r to increase the Pulse Output Rate by a factor of 10.
Press s to decrease the Pulse Output Rate by a factor of 10.
kW Rolling Max Demand: MD based
Press and hold for 2 seconds when done.
on rolling average of system kW :Peak
kW MD (largest since last reset)Current
Period kW MD Instantaneous kW
System PF, Hz, W: 3-Phase Power Factor
(‘-’ denotes capacitive).Frequency measured on phase 1 voltage.3-Phase instantaneous Watts calculated as W1+W2+W3
6 19
4.4 Setting The PT Primary Voltage
The next item in the programming menu allows the user to set the PT
Primary line-line voltage, in the range 60V to 50,000V, to match the
primary of the potential transformers connected to the meter inputs. The
secondary of the PTs must match the nominal line-line input voltage
specified on the meter label. If no potential transformers are fitted the PT
setting must match the nominal line-line input voltage specified on the
meter label.
Figure 4-2. Setting the PT Primary Constant
Capacitive varh Register: System var
integrated over time is accumulated in
this register while the load measured is
capacitive (displayed as negative).The
most significant digit is displayed on the
middle line.
Total varh Register: The absolute sum
of Inductive + Capacitive varhThe most
significant digit is displayed on the middle
line.
Phase 1 PF, Volts & Amps: Phase
1 PF (‘-’ denotes capacitive).Phase 1
Voltage scaled as abovePhase 1 Current
scaled as above
Press r to increase the PT Primary Constant in steps of 1 Volt.
Press s to decrease the PT Primary Constant in steps of 1 Volt.
Press and hold for 2 seconds when done.
18 7
Phase 2 PF, Volts & Amps: Phase 2
PF (‘-’ denotes capacitive).Phase 2 Voltage scaled as abovePhase 2 Current
scaled as above
Phase 3 PF, Volts & Amps: Phase 3
PF (‘-’ denotes capacitive).Phase 3 Voltage scaled as abovePhase 3 Current
scaled as above
2.4 Display Menus
4. PROGRAMMING
G100
I V P >>
Phase Currents Phase Voltages System PF, Hz, W Phase 1 PF, V, I
Ampere Demand Line-Line Voltages Phase Watts Phase 2 PF, V, I
Pk Ampere Demand Voltage Demand Phase 3 PF, V, I
Pk Voltage Demand
G200
I V P >>
Phase Currents Phase Voltages System PF, Hz, W Phase 1 PF, V, I
Ampere Demand Line-Line Voltages Phase Watts Phase 2 PF, V, I
Pk Ampere Demand Voltage Demand Wh Register Phase 3 PF, V, I
Pk Voltage Demand
G300
I V P >>
Phase Currents Phase Voltages System PF, Hz, W Phase 1 PF, V, I
Ampere Demand Line-Line Voltages System PF, Hz, var Phase 2 PF, V, I
Pk Ampere Demand Voltage Demand Phase Watts Phase 3 PF, V, I
Pk Voltage Demand Phase var
Pk MD, Rolling MD,
kW
Wh Register
Total varh Register
Inductive varh Register
Capacitive varh Register
4.1 Description
The GIMA is designed for use in a wide variety of systems. A range of
programmable features allow the unit to be set-up for a specific application. Programming is available using the front panel keypad and display
while the unit is operational.
4.2 Entering and Exiting Programming Mode
To enter programming, Press I and V together and hold for 5 seconds.
When all user programmable settings are complete, Press I and V
together and hold for 5 seconds to return to measurement mode.
4.3 Setting The CT Primary Current
The first item in the programming menu allows the user to set the CT
Primary current, in the range 5A to 20000A, to match the primary of the
current transformers connected to the meter inputs. The secondary of
the CTs must match the nominal input current specified on the meter
label. Once set, the constant acts as a multiplying factor in the internal
calculation of relevant measurements.
Figure 4-1. Setting the CT Primary Constant
Press r to increase the CT Primary Constant in steps of 1 Amp.
Press s to decrease the CT Primary Constant in steps of 1 Amp.
Press and hold for 2 seconds when done.
8 17
Figure 3.4 3-Phase 4-Wire
2.5 Display Scaling
The GIMA scales it’s displays automatically to provide the optimum resolution dependant on user settings (CT and PT Primary). This provides direct reading of parameters with decimal points and legends automatically
selected (e.g. kW or MW etc).
2.5.1 Voltage Scaling (Phase, Peak, MD, Pk MD)
PT Setting Example Display
60VL-L - 140VL-L 20.00 V
141VL-L - 1,400VL-L 200.0 V
1,401VL-L - 14,000VL-L 2.000 kV
14,001VL-L - 50,000VL-L 20.00 kV
Figure 3-5. Single Phase
2.5.2 Line-Line Voltage Scaling (V
PT Setting Example Display
60VL-L - 80VL-L 50.00 VL-L
81VL-L - 800V 500.0 VL-L
801VL-L – 8,000VL-L 5.000 kVL-L
8,001VL-L - 50,000VL-L 50.00 kVL-L
L-L
)
2.5.3 Current Scaling (Phase, Peak, In, MD, Pk MD)
CT Setting Example Display
5A - 8A 5.000 A
9A - 80A 50.00 A
81A - 800A 500.0 A
801A – 8,000A 5.000 kA
8,001A – 20,000A 20.00 kA
Figure 3-6. 3-Phase 3-Wire using Potential Transformers
16 9
2.4.4 Per Phase & System Power Scaling (W, VA, var)
PT Setting x CT Setting Example Display
300VA - 1,400VA 200.0 W
1,401VA - 14,000VA 2.000 kW
14,001VA - 140,000VA 20.00 kW
140,001VA - 1,400,000VA 200.0 kW
1,400,001VA - 14,000,000VA 2000 kW
14,000,001VA - 140,000,000VA 20.00 MW
140,000,001VA – 1,000,000,000VA 200.0 MW
2.4.5 Energy Registers (Wh, VAh, varh)
PT Setting x CT Setting Example Display
300VA - 1,400VA 9999.999 kWh
1,401VA - 14,000VA 99999.99 kWh
14,001VA - 140,000VA 999999.9 kWh
140,001VA - 1,400,000VA 9999999 kWh
1,400,001VA - 14,000,000VA 99999.99 MWh
14,000,001VA - 140,000,000VA 999999.9 MWh
140,000,001VA – 1,000,000,000VA 9999999 MWh
3.5 Connection Schematics
Figure 3-2 3-Phase 3-Wire 2CTs (Not suitable for neutral current measurements)
2.4.6 Miscellaneous (Frequency, PF, THD)
All Settings Example Display
System and Phase PF 1.000 PF
Amps and Volts % THD hd 99.9
Frequency 50.0 hz
10 15
Figure 3-3 3-Phase 3-Wire 3CTs
3.2 CT Connections
The GIMA is designed for use with external current transformers (CTs).
Recommended types should conform to Class 1 per IEC 60044-1. The
secondary of the CT should be specified to suit the input rating defined
on the meter label. Cables used for the current circuit should have a
maximum conductor size of 4.0mm2 and should be kept as short as
possible to reduce cable losses loading the CT secondary.
CT Inputs to the meter are isolated from each other and all other parts of
the circuit. This allows use on a wide variety of systems including those
requiring common and/or earthed CT secondaries.
WARNING :
NEVER leave the secondary of a current transformer open circuit
while a primary current flows. In this condition dangerous voltages may be produced at the secondary terminals.
3.3 Voltage Connections
Cables used for the voltage measurement circuit should be insulated to a
minimum of 600V AC and have a minimum current rating of 250mA. The
maximum conductor size is 4.0mm2.
External protection fuses are recommended for the voltage measurement inputs. These should be rated at 160mA maximum, Type F, and
should be able to withstand voltages greater than the maximum input to
the meter.
3.4 Auxiliary Mains Supply (L & N)
The GIMA uses an isolated auxiliary mains supply separate from the
voltage measurement inputs. This may be connected separately or in
parallel with the measurement inputs provided the ratings detailed on the
instrument label are not exceeded.
Separate connection of the auxiliary mains is required, for example,
when :
· A suitable supply voltage is not available locally.
· Measurement voltages are expected to vary over a wide range
· A backup supply is required to maintain meter display
2.5 Energy Register Reset
All accumulating energy registers may be simultaneously reset to zero
using the front panel keys. Once reset, energy readings are lost forever
so great care must be taken when using this feature. To reset all energy
registers
· Select any energy display page as described above
· Press P and >> keys together and Hold for 5 seconds.
2.6 Peak Voltage Reset
The peak voltage readings may be simultaneously reset to zero using the
front panel keys. Once reset the old values will be immediately replaced
by the latest instantaneous readings and subsequent peaks as they occur. To reset Peak Voltages
· Select the Peak Voltage display page as described above
· Press P and >> keys together and Hold for 5 seconds.
2.7 Peak Current Reset
The peak current readings may be simultaneously reset to zero using the
front panel keys. Once reset the old values will be immediately replaced
by the latest instantaneous readings and subsequent peaks as they occur. To reset Peak Amps
· Select the Peak Current display page as described above
· Press P and >> keys together and Hold for 5 seconds.
2.8 Peak Demand Reset
Peak rolling demand readings (Volts, Amps kW, kVA and kvar) may be
reset to zero using the front panel keys. At the end of the next sub period the peak will be set to the latest rolling average value. To reset the
Peak MD
· Select the Peak Amps, Volts, kW, kVA or kvar Demand display
page as required
· Press P and >> keys together and Hold for 5 seconds.
The auxiliary mains supply is internally fused at 250V, 100mA type T.
External fusing is required if the auxiliary supply voltage exceeds 250V.
The meter ratings are detailed on the instrument label.
WARNING :
CHECK the instrument LABELS for correct input ratings.
Incorrectly rated inputs may permanently damage the device
14 11
2.9 Isolated Pulse Outputs
GIMA meters which display kWh and/or kvarh incorporate isolated pulse
output(s). These outputs provide a simple interface to external systems
such as building management centres etc.
Each output takes the form of a normally open, volt free contact pair
which provides a low resistance, for 100mS, at the end of a pre-set number of increments of the associated energy register (‘pulse rate’). The
pulse rate of each output may be programmed by the user to match the
requirements of the external system. For further details on programming
the GIMA refer to Section 4.
3. INSTALLATION
3.1 Panel Mounting
Panels should be of thickness 1mm to 4mm with a square cut-out of
92mm (+0.8 - 0.0). A minimum depth of 72mm should be allowed behind
the panel for the meter. Remove the panel mounting clips and insert the
meter into the cut-out from the front of the panel. Push the meter home.
Ensure the screws in each panel mount clip are fully retracted and insert
the clips as shown in the diagram below. Tighten the screws to secure
the meter firmly in the panel.
DO NOT OVERTIGHTEN.
12 13
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