732B/734A
Instruction Manual
1-4
• LOW BAT blinks to warn you to plug the line cord into ac power when only a few
hours of battery operation remain.
• CHARGE lights when the battery is being recharged in constant-current charge
mode, and is off when the battery is charged to the 90% level. At 90% of full charge,
a float charge completes and maintains full charge.
You can monitor the oven temperature by measuring the resistance of the oven
temperature thermistor through the rear panel MONITOR/EXT BAT IN connector.
Instructions for using this connector are in Section 3.
Hardware Options 1-2.
Table 1-1 summarizes hardware options for the 732B DC Standard. Calibration Options
are described further on in this section.
Table 1-1. 732B/734A Hardware Options and Accessories
Model Number Name
734A-7001 Instrument Enclosure
732B-7001 External Battery and Charger
732B-7002 Transit Case for two 732Bs or 732B-7001s
Y734 Rack Mount Kit for 734A or 734A-7001
734A-7001 Instrument Enclosure 1-3.
The Model 734A DC Reference Standard is made up of one 734A-7001 Instrument
Enclosure and four 732B DC Standards. The Model 734A-7001 can be purchased
separately as needed for your application. The enclosure securely holds up to four 732B
DC Standards and/or 732B-7001 External Battery/Chargers (described next).
An ac power bus inside the 734A-7001 enclosure powers up to four 732B units with only
one ac line cord. Using the enclosure allows you to rack mount 732Bs. (See Y734 Rack
Mount Kit.)
723B-7001 External Battery and Charger 1-4.
The Model 732B-7001 External Battery and Charger is contained in the same enclosure
as the 732B. This means it fits into and is powered by the 734A-7001 Instrument
Enclosure just like a 732B DC Standard.
When the external battery is completely charged and connected to a completely charged
732B, it increases 732B battery operating time from 72 to 130 hours. Just as in the 732B,
the charger in the 732B-7001 takes 36 hours to completely charge the battery (with no
load on the battery). Refer to Section 3 for information about interconnecting 732Bs and
732B-7001s.
Accessory Y734 Rack Mount Kit 1-5.
To rack mount a 732B, use the 734A-7001 Instrument Enclosure (standard equipment
with Model 734A). Use Accessory Y734 Rack Mount Kit to mount the enclosure in a
rack. Outside dimensions of the 732B and 734A are shown in the specifications at the
end of this section. Instructions for rack mounting the 734A-7001 Instrument Enclosure
are packed with the kit.
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