Battery Test For Accutorr Plus; Low Battery Indicator And Low Battery Cut-Off - Datascope Accutorr Plus Service Manual

7.7 BATTERY TEST FOR ACCUTORR PLUS

NOTE: During this test, the real time clock will reset.
1. Disconnect the cable from the battery and remove the AC power cord from the UUT.
Connect the power supply positive output to the battery cable positive terminal and
the negative power supply terminal to the negative terminal of the battery cable. Set
the power supply voltage to 14.5, ± .1 volts for SLA battery, 12.5 ± .1 volts for Li-Ion
battery.
2. Press the On/Standby key to power up UUT. Verify that the normal power up
sequence as described in this document occurs and that the indicator for the battery
symbol on the keypad is lit.
7.7.1
CAUTION: During this test, the real time clock will be reset and any Trend information will be
lost. Temporary user preference settings will also be erased.
Power Supply requirement: the power source used for testing needs to source 0 to 15
VDC and able to withstand current spikes of 3 to 4 Amperes without current or voltage
sags.
1. Remove the battery pack and AC mains cord. Remove monitor rear cover. Disconnect
the Battery Connector cable from the power supply.
2. Set the external power supply voltage to 14.5 VDC, current limit set to 4 Amps. Con-
nect the positive of the external power supply to the input side of the F3 fuse. (4 A)
Connect the negative side of the external power supply to the negative pin of the
Accutorr Plus power supply or to the chassis near the battery connector.
3. Connect a DVM to the load side of F3 of the Accutorr Plus power supply and the
chassis of the Accutorr Plus. This method will read the actual voltage applied to the
internal power supply and will be the reading used to determine the Low Battery In-
dicator and Low Battery Cut-Off voltages.
4. Turn the monitor ON, and allow to complete the self check initialization.
5. Slowly decrease the external power supply voltage, in approximately 100 mv. steps,
every 0 seconds. Note the voltage where the Battery LED begins to flash. Note this
voltage and compare to the specification in the following table. Continue to decrease
the voltage until the monitor turns off. This is the Low Battery cut-off voltage. Note
this voltage and compare to the specification in the following table.
Type of Battery Installed
Sealed Lead Acid
Lithium Ion
6. Turn the monitor Off, re assemble and install the battery pack.
7-18
Revised 03/25/02

Low Battery Indicator and Low Battery Cut-Off

Low Battery Indicator limits Low Battery Cut-Off limits
10.95 to 11.63 VDC
9.95 to 10.61 VDC
9.8 to 10.7 VDC
8.7 to 9.5 VDC
Accutorr Plus Service Manual
Chapter 7 - Calibration