MODEL 25
TIME MARK is a division of
True RMS 3-Phase
Monitor
User selectable relay operation
options
Low or High Trip with independent
delays or disabled
User programmable
Can be restored to factory settings
or calibrated in the field using a
True RMS Voltmeter
Model 25SG has silver with gold
flash contacts for low current.
DESCRIPTION
Model 25 True RMS 3-Phase Monitor has a display
that shows the voltage with an accuracy of +/- 0.5%.
The display is updated every second and re-initialized
every 30 seconds.
This unit has a user selectable relay option for High-Low
or DPDT. It can also be user-selected to energize on
fault or de-energize on fault. The user can select
automatic or manual restart on the Model 25. The SG
version of the Model 25 has silver with gold flash
contacts for low current applications.
Model 25 True RMS 3-Phase Monitor can be either
calibrated using a True RMS Voltmeter or can be
restored to factory defaults in the field.
UL SPECIFICATIONS*
Model 25 and 25SG
Input
Voltage (VAC)
Amps 1mA
Frequency
DC Power 24 Volts, 2 watts
Output
50/60Hz (400Hz optional with jumper)
240V AC, 10A, Resistive
120V AC, 4A, General Use
240V AC, 2A, General Use
80-550 Volts
C300, Pilot Duty
OTHER SPECIFICATIONS
Model 25 and 25SG
Start-up Delay 5 secs. Min. or Automatic reset delay setting
Repeat Accuracy
Reset Type
Expected Relay Life Mech: 10 million operations
Elec: 100,000 min. at rated load
Operating Temp
Humidity Tolerance
Enclosure Material
Mounting
Weight
* R/C or Listed (Type 1 or Type 2) UL 1449 overvoltage
control devices with a Voltage Protection Rating of 6KV max.
* For use in a Pollution Degree 2 Environment.
(to allow for solid lock)
± 0.5 % (fixed conditions)
Manual or Automatic
-20°F to +130°F
0-97% w/o condensation
Lexan 920
Polycarbonate
UL 94 V-0 1.5 mm
UL E45329
DIN Rail 35mm
8.5 oz.
Page 1 of 4 06/2013
© 2013 TIME MARK CORPORATION
TIME MARK is a division of
MODEL 25
True RMS 3-Phase Monitor
READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.
KEEP THIS DATA SHEET FOR FUTURE REFERENCE.
GENERAL SAFETY
POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 25.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
INSTALLATION AND SETUP
Controls:
Rotary encoder with switch. Pressing the
encoder switch will display the set points.
Pressing the encoder switch for more than 5
seconds will enter the setup mode. Pressing
switch displays the next menu item. Holding
down the switch during setup mode will
sequence through menus with 1 second
intervals. Rotating the knob clockwise increases
the value and counter-clockwise will decrease
value.
For non-value options, rotating the knob either
way will change the options on the display.
Setup Options:
(Press encoder for at least 5 seconds to
enter setup)
High Voltage: (Factory—Enabled, Set point =
550V, Delay = 5S)
Enable/Disable:
(*If disabled set point and delay are
skipped)
Set Point Range:
Low setpoint + 1% to 550V in 0.5V steps
High Trip Delay:
0 to 20.0 seconds in 0.1Sec steps
Low Voltage: (Factory—Enabled, Set point =
80V, Delay = 5S)
Enable/Disable:
(*If disabled set point and delay are
skipped)
Set Point Range:
80 to High Setpoint -1% in 0.5V steps
Low Trip Delay:
0 to 20.0 seconds in 0.1Sec steps
TYPICAL APPLICATION—MONITOR AND CONTROL
PHASE
C C | B B | A A
24VDC MANUAL
RESET
LOW HIGH
NO C NC | NO C NC
TYPICAL APPLICATION—MONITOR AND ALARMS
Page 2 of 4 06/2013
© 2013 TIME MARK CORPORATION
TIME MARK is a division of
MODEL 25
True RMS 3-Phase Monitor
READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.
KEEP THIS DATA SHEET FOR FUTURE REFERENCE.
GENERAL SAFETY
POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 25.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
INSTALLATION AND SETUP (Continued)
Relay Operation: (Factory = HI-LO)
Voltage High/Low Option:
Separate High/Low Relays
DPDT
Other faults DPDT
Relay Operation on Fault: (Factory - De-energize on
fault)
De-energize on fault
Energize on fault
Hysteresis set
Unbalance set
Phase Loss set
Reverse Phase set
Restart: (Factory - Automatic)
Automatic or Manual (in Manual rotating the knob or
closing an external switch will reset the unit)
Automatic Restart Delay Range: (Factory - 5S)
0 to 300.0 Seconds in 0.1 Second steps
Exit from Setup Options:
Repeat Setup:
Press encoder to begin setup from beginning.
(High Enable)
Exit & No Save:
Press encoder to exit setup. Any changes have
been discarded.
Exit & Save:
Press encoder to exit setup and save changes.
Unit will begin using new settings.
Start Up Delay:
5 Seconds Minimum or Automatic Restart Delay
setting (to allow for solid lock).
OPTIONAL 400HZ FREQUENCY SETUP
To change the Model 25 from the factory default 50/60Hz
frequency to 400Hz, simply remove the blank cover plate
(without holes) and move the jumper from 50/60Hz to
400Hz . Replace the cover plate when completed.
UNIT FIELD RESTORE SETTINGS AND
RECALIBRATION
1) From a powered down condition, apply the 3-Phase
voltage first.
2) Press and hold the Encoder switch while applying the
DC power to the unit. As soon as the splash screen
appears, release the button. After the splash screen
ends, the display will show “No Rest Fac”. Rotate
encoder to change option to “Yes” to restore factory
settings. Press the Encoder switch.
3) The display will show the phase A-B voltage. Place a
meter between phases A and B. Rotate encoder to
change the reading on the display to be what is on the
meter. When readings match (+/-0.5V), press the
Encoder switch.
4) The display will show the phase B-C voltage. Place a
meter between phases B and C. Rotate encoder to
change the reading on the display to be what is on the
meter. When readings match (+/-0.5V), press the
Encoder switch.
5) The display will show the phase C-A voltage. Place a
meter between phases C and A. Rotate encoder to
change the reading on the display to be what is on the
meter. When readings match (+/-0.5V), press the
Encoder switch.
6) The unit will return to normal operation.
Page 3 of 4 06/2013
© 2013 TIME MARK CORPORATION
TIME MARK is a division of
MODEL 25
True RMS 3-Phase Monitor
READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.
KEEP THIS DATA SHEET FOR FUTURE REFERENCE.
GENERAL SAFETY
POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 25.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
DIMENSIONS
WARRANTY
This product is warranted to be free from defects in
materials and workmanship, and is covered by our
exclusive 5-year Unconditional Warranty. Should this
device fail to operate for any reason, we will repair it for
five years from the date of manufacture. For complete
warranty details, see the Terms and Conditions of Sales
page in the front section of the Time Mark catalog or
contact Time Mark at 1-800-862-2875.
Page 4 of 4 06/2013
© 2013 TIME MARK CORPORATION
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