I have a 5 replicates of an experiment comparing the amount of bacteria on various surfaces. I've standardise the values because the absolute values don't mean a lot to a potential reader: $\frac{x-\bar{X}}{S}$, where $\bar{X}$ is the sample mean and $S$ is the sample variance.
So far so good, but what should I do with the errorbars representing standard deviation units? How do these get standardised? The following figure shows the normalised values with error bars that are $\frac{s_i -\bar{S}}{S}$. Is this right? Does it make sense? Or is it non-sense? Data is below 
Location Expt1 Expt2 Expt3 Expt4 Expt5
1 226 301 192 234 200
2 306 243 349 286 266
3 327 261 366 282 259
4 255 210 245 294 255
5 269 267 290 347 336
6 240 310 219 243 203
7 229 254 406 339 304
8 279 241 318 274 284
9 361 284 335 346 281
10 452 341 347 418 390
11 475 360 345 280 266
12 444 398 457 431 531
13 599 441 650 562 616
14 555 514 513 529 452
15 356 244 295 265 277
16 365 303 359 374 334
17 310 319 319 266 298
18 318 298 394 339 331
19 445 395 456 429 422
20 398 477 428 451 436
21 274 317 294 238 277
22 220 288 261 271 258
23 301 354 288 244 371
24 319 342 362 356 354
25 379 225 485 274 304