SERVICING - Section 8
8-10 MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
Repeat steps 8 to 9 to adjust the peak measurement calibration factors.
IMPORTANT: This must be done with the dynamic measurement mode set to PEAK and in the
FAULT state (FAULT button flashing).
11. When done, the CAL1 command must be sent via the RS-232C interface to enable saving of the
calibration factors.
Next, select OTHER SERV CALIBRATION SAVE to save the calibration factors in non-volatile
memory so that these new calibration factors factors will be remembered next time the MTS-1720 is
powered up.
8.5.6 AC Current (I3) Measurement Calibration (
Φ−Φ
Values)
(This applies only to systems with an MTS-1720).
1.
Connect the I3 OUTPUT A,B,C,N terminals to a three-phase current meter or power meter. You will
require a meter which is directly able to read
Φ−Φ
current (e.g. IAB, IBC, ICA).
2.
Set dynamic measurement mode to RMS (see section 5.1.1). Note: Each current output must have a
return connection to the IN terminal.
Select I3-WYE current mode, static operation mode.
3.
Select
Φ−Φ
A-B fault mode.
Short the external start trigger contact sense inputs to hold the MTS-1710 in FAULT state. This causes
IA & IB to be 180
°
out of phase with each other.
4.
Press [CURRENT], adjust the IAB current down to 0, and then slowly up to 6.0A (as read on an external
reference meter).
Select OTHER SERV CALIBRATION MEASUREMENT I3 in the menu. Turn the [MODIFY] knob
to adjust the calibration factor until the reading is the same as read on a reference meter (the output
current doesn’t change when this is done).
Press [SELECT].
5.
Exit the menu, and adjust the IAB current to 23A.
Select OTHER SERV CALIBRATION MEASUREMENT I3 in the menu. Turn the [MODIFY] knob
to adjust the calibration factor until the reading is the same as read on a reference meter (the output
current doesn’t change when this is done).
Press [SELECT].
6.
Exit the menu, and adjust the IAB current to 40A.
