3-10 Return to Section Topics 6517B-900-01 Rev. A / Jun 2008
Section 3: Basic Measurements Model 6517B Electrometer User’s Manual
Auto discharge
When enabled, Auto Discharge is used to automatically reset the charge reading to zero when the
specified charge level is reached. After the integrator resets, the charge measurement process
simply restarts at zero. Perform the following steps to enable or disable Auto Discharge.
1. Press the CONFIG key and
then Q to display the coulombs configuration menu.
2. Use the cursor keys ( and ) to place the cursor (blinking menu item) on AUTO-
DISCHARGE and press ENTER.
3. Perform step a to enable Auto Discharge or perform step b to disable it:
a. Enable Auto Discharge: Place the cursor on ON and press ENTER to display the
present discharge level. Use the cursor keys ( and ) and the RANGE keys ( and
) to set a different discharge level and press ENTER.
b. Disable Auto Discharge: Place the cursor on OFF and press ENTER.
4. Use the EXIT key to exit from the menu.
Figure 3-5
Charge measurements
Temperature and humidity measurements
The Model 6517B can make external temperature measurements from –25°C to 150°C using the
Keithley Instruments Model 6517-TP type K thermocouple (which is a supplied accessory).
The Model 6517B can make relative humidity measur
ements (0 to 100%) using the Keithley
Instruments Model 6517-RH humidity probe (which is available as an option).
Connections
The Model 6517-TP (thermocouple) and Model 6517-RH (humidity probe) connect to the rear
panel connectors labeled “TEMP TYPE K” and “HUMIDITY” as shown in Figure 3-6.
NOTE Keith
ley Instruments recommends that the thermocouple junction of the Model 6517-TP
be electrically insulated from ground and voltage potentials. Erroneous readings will
result if the thermocouple comes in contact with ground or a voltage potential.
Red (HI)
Black (LO)
6517B
Shield (Optional)
Q
s
Measured
Charge
Input low connected
to shield
Triax
Cable
OPTION SLOT
250VDC MAX
MADE IN
U.S.A
LINE RATING
50-60 Hz
100 VA MAX.
LIN
WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING.
1250Vpk
PREAMP
OUT
1000VDC
MAX
FUSE
630mAT
315mAT
10
12
22
24
COMMON 2V OUT
LO HI
V SOURCE
TRIGGER LINK RS-232
DIGITAL I/O
HUMIDITY
TEMP
TYPE K
INTERLOCK
IEEE-488
2VDC MAX
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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