TSI Instruments HM685, Owner'S Manual

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2-2 Hydronic Manometer Model HM685
P o w e r i n g t h e I n s t r u m e n t
The HM685 Hydronic Manometer is equipped to power either by four (4)
AA-size batteries (alkaline or rechargeable NiMH) or the AC adapter.
Using the AC Adapter
The AC adapter allows the HM685 Hydronic Manometer to power from a
standard AC wall outlet. When using the AC adapter, the batteries (if
installed) are bypassed. The AC adapter also charges the NiMH type
batteries (if installed) in the unit.
Note: With the battery-type selection switch set to NiMH, the manometer
will initiate charging the batteries whenever the AC adapter is
connected.
C a u t i o n s

Only use TSI P/N 6004983, the AC adapter supplied with the
instrument, when powering the HM685 Hydronic Manometer
externally.
Do not connect the AC adapter or car adapter provided
with the battery optional charger (801093) or any other AC adapter to
the HM675/685. Using any other power cable or power supply may
cause damage to the device and void the warranty.

Never plug into the instrument any power supply other than the one
provided with the instrument.
W A R N I N G
Never charge non-rechargeable batteries by setting battery-type selection
switch to NiMH with alkaline or other non-rechargeable batteries. Fire,
explosions, or other hazards may result.
Battery Installation
To install/replace the batteries:
1. Turn the manometer off and locate the battery cover on the back of
the unit.
2. Loosen the screw on the battery compartment cover and lift to remove.
3. Remove the battery holder. Tapping the backside of the meter against
your hand may assist in removing the battery holder.
4. Remove the old batteries and replace with fresh batteries (alkaline or
rechargeable NiMH). Ensure that the batteries are correctly oriented
within the battery holder.