HOBO® Micro Station (H21-002) Quick Start
17595-A MAN-H21-002-QSG
Setting up the Logger
1.
Insert the four AA alkaline or lithium batteries and place
the battery strap on the batteries.
2.
With a crescent wrench, remove the dome nut from the
stuffing gland in the sensor port.
3.
Push the slit insert out from the inside of case. You may
need to push the slit insert out using a pen (capped end),
pencil (eraser end), or other blunt instrument.
4.
Some sensors have an anti-snag device on the connector
as shown below. If any of your sensors has this device,
check that the connector fits through the stuffing gland.
If the connector does not fit through the stuffing gland,
you will need to trim the anti-snag device with a knife so
that the connector looks like the one below.
5.
Insert the sensor connectors through the dome nut. The
threaded side of the dome nut should be facing towards
the connector. Then, slide the cables through the stuffing
gland and through the hole in the case. Push the cables
into the slit insert.
Note:
The electronics on some older temperature sensors
are housed in a tube that is close to the sensor connector.
If you have any of these sensors, be sure to insert them
first because they will need more room inside the logger.
Adjust the sensor as needed so that the tube with the
electronics fits inside the logger without too much
unnecessary bending of the cable.
6.
Plug the sensors into the logger. Adjust the cable length as
necessary so there isn’t excess cable inside the case.
7.
If you are using fewer than four sensors, add the o-ring
cord(s) to plug the empty hole(s) in the slit insert.
8.
Apply some silicone grease to the slits on the insert.
9.
Push the slit insert back into the stuffing gland. Pushing
the slit insert in at a slight angle and with a slight twist may
help it slide in more smoothly.
10.
Screw the dome nut onto the stuffing gland, tighten by
hand, and then an additional ½ to ¾ turn with an
adjustable wrench. The dome nut must be snug, but
shouldn’t be overtightened.
11.
From the back side of the stuffing gland, fill the void inside
with silicone grease from the package.
12.
Remove the desiccant pack from its foil pouch and place
inside the logger enclosure to minimize internal
condensation.
13.
Apply silicone grease to the outside rim of the case where
the cover meets up with the housing. The grease should be
applied sparingly in this location.
14.
Screw the clear cover back onto the case. Use a Phillips-
head screwdriver to tighten the four cover screws.
Anti-snag device on some
external sensor connectors
Anti-snag device
removed from the
external sensor
connector
Dome nut
Stuffing gland on sensor port
Dome nut
Slit insert
Sensor cable and
connector
Stuffing gland on sensor port
Stuffing gland
slit insert
Battery strap
O-ring cord to fill
empty holes
