First off, you may want to move the device to the Environmental device class. It's not really a server is it?

Next, determine which OIDs you want to monitor. Then create a performance template. You will define data sources for each OID. You then create graphs. In each graph, you will define graph points. Each graph point will use the data from one data source.

Read section 6.2 of the Administration guide.

Device classes are an organizational structure that allows you to group devices of similar type together. You might put your routers in device class /Net/Routers and your switches in /Net/Switches, UPS devices can go in /Power/Ups and environmental monitoring can go in /Environmental.

You can use the basic device classes that come with Zenoss or you can make your own. I think there is a default class named /Environ that I changed to /Environmental.

To create your own device classes: navigate to any device class and click the drop down in the Sub-Classes window. Select Add New Organizer...

First, I would try adding a 0 to the end of your OID. If that doesn't work try one of the following:

Install the mib_utils zenpack (VERY handy tool for working with MIB and OIDs). You can use it to test the OID against your device directly from your zenoss box.

Alternatively you can SSH into zenoss and execute an snmpwalk command:

$ snmpwalk -v1 -c public [device ip] 1.3.6.1.4.1.3699.1.1.3.1.2.1

or

$ snmpwalk -v1 -c public [device ip] 1.3.6.1.4.1.3699.1.1.3.1.2.1.0