AEMC Instruments 2137.81 User manual

BATTERY REPLACEMENT PROCEDURE

POWER & ENERGY LOGGERS

MODELS PEL 102 & PEL 103

(Battery for Cat. #’s 2137.51, 2137.52, 2137.61, 2137.62)

The Power & Energy Loggers PEL 102/103 include an 8.4V NiHM

battery pack (Cat. #2137.75) for backup power. This battery,

shown below, can be replaced by the user. With normal use, the
battery should only need to be replaced approximately once every
three or four years.

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

IMPORTANT WARNING!

The PEL battery replacement must be performed

carefully and in strict accordance with the

procedure described in this manual. Any variation

could result in damage to the instrument and may

void your warranty. If you are unsure about

performing this procedure, return the PEL to

AEMC®for a factory battery replacement.

Before You Begin

To replace the battery in the PEL, you will need the following:

 A clean work surface free of debris, water, and other

possible contaminants. This surface should be well-lighted
and provide sufficient room to perform the steps below.

 8.4V NiHM battery pack.

 Torx T10 screwdriver (Torx type screwdrivers are also

known as “star” screwdrivers)

 Tape (masking, electrical, etc.)

 (Optional) A small non-conducting implement such as a

drink stirring stick or toothpick

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

Battery Replacement Procedure

To replace the battery in the PEL 102/103, disconnect the
instrument from all electrical sources and sensor probes. Then
follow these steps:

1. Apply tape to the control buttons on the PEL front panel (see
Figure 1). This tape will ensure that the buttons remain in
place when you remove the PEL’s front cover from the back
cover.

2. Tape the PEL’s endplates to the back cover
(see Figure 2). This helps ensure that the endplates remain
attached to the back cover when you remove the front cover.

Figure 1

Figure 2

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

3. Turn over the PEL, and locate the six fastening screws on the
back of the instrument.

Figure 3

4. Using a Torx T10 screwdriver, remove these fastening screws.

5. Carefully separate the front cover of the PEL from the back
cover. Typically, the two covers fit together very snugly, so it
may be difficult at first to separate them.

One way to do this is to turn the instrument on its side as
shown in Figure 4, and then carefully separate each corner in
turn, starting with the bottom right corner. With your fingers on

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

the bottom endplate, pull the covers apart, ensuring that the
endplate remains attached to the back cover.

CAUTION: Do not allow either the top or bottom endplate
to become separated from the back cover. This may cause
damage to the input and connection terminals, requiring
that the PEL be sent to AEMC for repair.

Figure 4

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

6. With the front cover removed, locate the battery pack.

Figure 5

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

7. Gently remove and unplug the battery from the PEL. A small
non-conductive implement such as a drink stirring stick
(shown below) can be useful for doing this.

Figure 6

8. Inspect the plug of the replacement battery back, and note the
position of the connector pins.

Figure 7

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

9. Position the plug with the connector pins facing away from the
battery pack compartment. In the illustration below, the pins
are facing towards the left. Then very carefully insert the plug
by gently pushing it into the socket within the PEL. There is
very little room for this procedure, so an implement such as a
stirring stick or toothpick may be helpful in ensuring the plug is
securely inserted. (The PEL instrument will likely turn on when
you plug in the connector; this can be disregarded.)

Figure 8

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

10. Place the replacement battery into the compartment provided
for it within the PEL. When doing this, ensure that the
battery’s connector wires are positioned as shown in the

illustration on the left below. Be sure the wires do not cross

over the top of the post, as shown in the right illustration
below. If the wires are placed over the post, they will
likely be damaged when you replace the PEL top cover.

Figure 9

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Model PEL 102/103 Battery Replacement Procedure Cat. #2137.75

11. Replace the front cover, carefully ensuring that it is
securely in place.

12. Turn the PEL over, and replace the six fastening screws
removed in step 3 of this procedure.

13. Remove the tape applied to the front cover and endplates
at the beginning of this procedure. The PEL is now ready
for operation.

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