KEPCO JQE 150-1.5MVPY-26956 Half Rack - Manual (Page 37)

JQE SPECIAL OPR 081111 4-3
4.5.2.1 ZERO OUTPUT VOLTAGE (LOCAL PROGRAMMING) CALIBRATION
The following procedure calibrates the front panel VOLTAGE control for 0V output when set to
minimum. Due to slight resistance present even when the VOLTAGE control is set to minimum,
this calibration may not be accurate in remote mode where an external resistance is used for
remote programming of the output (see PAR. 4.5.2.2 if using remote programming).
1. Connect DVM between +S and -S of TB501 with the DVM reference terminal connected to
–S terminal.
2. Turn ON the unit, and allow unit to operate for 10 to 15 minutes before proceeding.
3. Adjust E
OUT
ZERO potentiometer (accessible through top cover) until output voltage reads
0V (tolerance: +0.025% of E
Onom
to +0.05% of E
Onom
).
4.5.2.2 ZERO OUTPUT VOLTAGE (REMOTE PROGRAMMING) CALIBRATION
The following procedure calibrates the output for 0V when using an external resistance for
remote programming of the output. See PAR. 4.5.2.1 if using front panel VOLTAGE control to
program the output.
1. Remove the link between terminals RVC and RPV1 of TB501 at the rear panel.
2. Connect the External Programming resistor (see PAR. 4.2) between terminals RPV1 and
RPV2 of TB501 at the rear panel.
3. Set the E
OUT
LOC-REM switch (accessible through top cover) to REM position (towards
the back panel)
4. Connect DVM between terminals +S and –S of TB501 with the DVM reference terminal
connected to –S terminal.
5. Turn the unit on and adjust the external programming resistance for minimum output volt-
age and allow unit to operate for 10 to 15 minutes before proceeding.
6. Adjust E
OUT
ZERO potentiometer (accessible through top cover) until output voltage reads
0V (tolerance –0 to +0.025% of E
Onom
).
7. Restore pre-calibration settings (PAR 4.5.1, steps 1 through 4).
4.5.3 ZERO CURRENT MONITOR CALIBRATION
1. At the rear panel. connect DVM to +C.MON of TB503, referenced to -C.MON of TB503.
2. Adjust C.MON ZERO potentiometer (accessible through top cover) until Output Current
Monitor signal reads 0V (tolerance ±0.1mV).
4.5.4 LOCAL FULL SCALE (FS) OUTPUT VOLTAGE CALIBRATION
1. Set front panel VOLTAGE control to the full clockwise position.
2. Connect DVM between +S and –S of TB501 with the DVM reference terminal connected to
–S terminal.